5 Best Professional Cavitation Machines for Med Spas

Choosing the best professional cavitation machine involves more than looking at the number of handles it includes. Ultrasonic frequency, cavitation strength, radiofrequency, vacuum pressure, and lipo laser specifications can differ substantially between machines.

Rejuva Fresh offers professional cavitation machines with optimized frequencies ranging from approximately 20 kHz to 65 kHz, along with adjustable-frequency systems and select 80 kHz configurations. Some machines also combine cavitation with RF, vacuum suction, lipo laser, EMS, or other body-contouring technologies.

Below, we break down five professional Rejuva Fresh cavitation machines and the specifications that set them apart.

What Is a Professional Ultrasonic Cavitation Machine?

An ultrasonic cavitation machine uses low-frequency ultrasound as part of non-invasive body-contouring treatments. The cavitation handpiece delivers ultrasound into the treatment area, producing acoustic cavitation effects within the targeted tissue.

Professional systems can vary considerably. A machine may use a fixed cavitation frequency such as 30 kHz or 40 kHz, while systems such as the Eris® allow the ultrasonic frequency to be adjusted.

Multifunction machines can also include separate technologies for different stages or goals of a treatment, including:

• Radiofrequency (RF)
• Vacuum suction
• Lipo laser
• Electrical muscle stimulation (EMS)
• Microcurrent
• Cooling technology

These technologies each work differently and have their own operating specifications.

What Is the Best Professional Cavitation Machine?

The best choice depends on the cavitation frequency you need, treatment areas, complementary technologies, treatment volume, and equipment format.

For example, Rejuva Fresh currently offers the Eris® 9-in-1 with adjustable 10–100 kHz ultrasound, the 2026 Adonis™ II 30K Pro 9-in-1 with an optimized 30 kHz frequency, several 40 kHz systems like the Fat Blaster 9-in-1, the Hera™, which is approximately 60 kHz, and the Marla™ 9-in-1.

Five Professional Rejuva Fresh Cavitation Machines at a Glance

Looking at the actual technical specifications gives you a clearer picture than simply choosing the machine with the most functions.

The Fat Blaster specifically includes:

• 5/10 Ultrasound Strength Rating
• 40 kHz optimized cavitation frequency
• 5 MHz RF
• 635–650 nm lipo laser
• 160 mW per diode, up to 100 kPa vacuum
• 0–5°C cold hammer cooling

The right system depends on how much frequency control and which treatment functions your practice needs.

20 kHz vs. 30 kHz vs. 40 kHz vs. 60–65 kHz Cavitation

One of the biggest differences between professional ultrasonic cavitation machines is frequency.

Frequency is measured in kilohertz (kHz). Lower-frequency ultrasound has a longer wavelength, while higher-frequency ultrasound has a shorter wavelength. Rejuva Fresh uses different cavitation frequencies across our equipment instead of relying on a single frequency for every machine.

A lower frequency does not automatically make a machine better overall. Frequency should be considered alongside ultrasound strength, the treatment area, complementary technologies, and the intended treatment protocol.

Cavitation Frequency vs. RF Frequency: What's the Difference?

Cavitation frequency and radiofrequency are two different specifications.

Ultrasonic cavitation frequency, usually listed in kHz, describes the frequency of the ultrasound generated by the cavitation handpiece. Rejuva Fresh cavitation systems include options around 20, 30, 40, 60, 65 kHz, plus select 80 kHz configurations.

RF frequency, typically listed in MHz, refers to the radiofrequency energy delivered by an RF handpiece. For example:

• The 2026 Adonis™ II 30K Pro uses 1 MHz RF.
• The Eris® 9-in-1 uses 1 MHz body RF and 5 MHz facial RF.
• Hera™ provides separate 1 MHz, 5 MHz, and 8 MHz RF options.
• Marla™ uses 5 MHz RF.
• The Fat Blaster 9-in-1 also uses 5 MHz RF. 

This is why two machines with similar cavitation frequencies can still have very different treatment configurations.

What Do kHz, MHz, Hz, nm, and kPa Mean?

Professional body-contouring machines use several different measurements because they can combine different technologies.

• kHz (kilohertz): commonly used for ultrasonic cavitation frequency
• MHz (megahertz): commonly used for radiofrequency settings
• Hz (hertz): used for electromagnetic or electrical stimulation frequency on applicable equipment
• nm (nanometers): identifies the wavelength of light, including lipo laser wavelengths
• mW (milliwatts): can describe laser output per diode
• kPa (kilopascals): measures vacuum pressure

These numbers are not interchangeable. A 40 kHz cavitation specification, 5 MHz RF specification, and 635–650 nm lipo laser wavelength describe three different technologies within the same machine.

Cavitation vs. EMS and HICMMT: How the Technologies Differ

Cavitation, EMS, and HICMMT have distinct technologies.

• Ultrasonic cavitation uses acoustic ultrasound energy and is measured in kHz.
• EMS, or electrical muscle stimulation, uses electrical impulses to stimulate muscle contractions. The 2026 Adonis™ II 30K Pro 9-in-1, for example, includes Bio-EMS pads alongside its cavitation, RF, and lipo laser functions.
• HICMMT, or High Intensity Concentrated Magnetic Muscle Training, is Rejuva Fresh's electromagnetic muscle-stimulation technology used in select EMShape® and PERFECT SHAPE® equipment. Applicable machines can operate at electromagnetic frequencies such as 1–150 Hz, depending on the model.

HICMMT is therefore a different body-sculpting technology rather than another ultrasonic cavitation frequency. 

1. Eris® 9-in-1: Adjustable-Frequency Professional Cavitation

The Eris® Lipo Cavitation Machine 9-in-1 Professional stands out because the ultrasonic cavitation frequency is adjustable from 10 kHz to 100 kHz, with 20 kHz as the optimized cavitation frequency.

Its current specifications include:

• Ultrasound Strength Rating: 7.5/10
• Optimized cavitation frequency: 20 kHz
• Adjustable ultrasonic frequency: 10–100 kHz
• Body RF: 1 MHz
• Facial RF: 5 MHz
• Lipo laser: 635–650 nm
• Lipo laser power: 150 mW per diode
• Vacuum pressure: 0–100 kPa
• Cold hammer temperature: 0–5°C

This provides more control over ultrasonic frequency than a fixed-frequency cavitation machine.

2. 2026 Adonis™ II 30K Pro 9-in-1: 30 kHz Cavitation With Multiple Modalities

The 2026 Adonis™ II 30K Cavitation Machine Pro 9-in-1 uses an optimized 30 kHz cavitation frequency, combined with several additional treatment functions.

The current system includes ultrasonic cavitation, RF, vacuum, lipo laser, EMS, microcurrent phototherapy, and a cooling handpiece.

Specification	2026 Adonis™ II 30K Pro
Cavitation frequency	30 kHz
Ultrasound Strength Rating	6/10
RF frequency	1 MHz
Lipo laser wavelength	635–650 nm
Lipo laser power	5 mW per diode
Vacuum pressure	0–100 kPa
Machine weight	21 lbs

The machine also includes eight lipo laser plates, two Bio-EMS pads, and separate RF heads for different treatment areas.

3. Hera™ Multi-Wave: 60 kHz Cavitation With Multiple RF Frequencies

The Hera™ Multi-Wave Vacuum RF Cavitation Machine takes a different approach to cavitation. Our machine combines approximately 60 kHz ultrasonic cavitation with vacuum suction, infrared, and multiple RF frequencies.

Our Hera RF system includes 1 MHz, 5 MHz, and 8 MHz frequencies across three different handles. 

This is a good example of why cavitation frequency alone does not describe the full system. Hera uses a higher ultrasonic frequency than Eris or the 30K Adonis while also providing a different RF configuration.

4. Marla™ 9-in-1: 40 or 80 kHz Cavitation With 5 MHz RF

The Marla™ 9-in-1 Cavitation Lipo Laser Body Sculpting Machine is available with 40 kHz or 80 kHz cavitation.

Current specifications include:

• Ultrasound Strength Rating: 6/10
• Cavitation frequency: 40 or 80 kHz
• RF frequency: 5 MHz
• RF power: 160W
• Lipo laser wavelength: 635–650 nm
• Vacuum pressure: up to 100 kPa

Marla's selectable cavitation-frequency configurations and 5 MHz RF system give providers another option within Rejuva Fresh's multifunction cavitation lineup.

5. Fat Blaster 9-in-1: 40 kHz Cavitation With High-Power Lipo Laser

The Fat Blaster 9-in-1 Lipo Laser Cavitation Machine uses an optimized 40 kHz ultrasonic cavitation frequency and combines cavitation with RF, vacuum, lipo laser, cold hammer, microcurrent, and photon functions. 

Technology parameters consist of:

Specification	Fat Blaster 9-in-1
Ultrasound Strength Rating	5/10
Cavitation frequency	40 kHz
RF frequency	5 MHz
Lipo laser wavelength	635–650 nm
Lipo laser power	160 mW per diode
Vacuum pressure	0–100 kPa
Cold hammer temperature	0–5°C
Machine weight	31 lbs

The Fat Blaster combines 40 kHz cavitation with RF, vacuum, lipo laser, cooling, and facial treatment functions. This gives practices several body and facial treatment options in one fixed-frequency system.

6-in-1 vs. 9-in-1 Cavitation Machines

The best professional ultrasonic cavitation machine is the system whose specifications and functions fit your treatment menu and workflow.

Rejuva Fresh offers both 6-in-1 and 9-in-1 systems across several cavitation frequencies. The main difference is the number and combination of treatment functions included, not necessarily cavitation strength or frequency.

For more detail, see our guides to top cavitation machines for spas, using a 6-in-1 cavitation machine, and using a 9-in-1 cavitation machine.

How to Choose a Professional Cavitation Machine

Start with the treatments you plan to offer, then look at the specifications and functions that support them.

Specification	What to Check
Cavitation	Frequency, ultrasound strength, and fixed vs. adjustable settings
RF	Frequency, power, and available handpieces
Vacuum	Maximum pressure and available vacuum functions
Lipo laser	Wavelength and output per diode
Additional functions	EMS, cooling, microcurrent, and other included technologies
Practice support	Training, warranty, and technical assistance

Professional vs. Personal Use

Professional practices should also check the intended use of each model. Rejuva Fresh identifies some cavitation equipment as suitable for personal use, as well as professional settings.

Why Choose a Rejuva Fresh Professional Cavitation Machine?

Rejuva Fresh is a U.S.-based developer and manufacturer of professional aesthetic equipment. Our equipment is developed and engineered in the United States, with finished machines produced through qualified manufacturing partners in the United States and South Korea, depending on the device.

Rejuva Fresh also provides personalized equipment training, technical assistance, and warranty coverage. The Fat Blaster, for example, currently includes a lifetime warranty on the main machine, 18 months of parts replacement coverage, and remote technical support. 

Explore the full range of professional cavitation machines or contact us for help choosing equipment for your practice.

Frequently Asked Questions About Professional Cavitation Machines

What is the best professional cavitation machine?

The best professional cavitation machine depends on the frequency, treatment functions, and equipment format your practice needs. Rejuva Fresh offers fixed and adjustable-frequency systems with optimized cavitation frequencies ranging from approximately 20 kHz to 65 kHz, plus select 80 kHz configurations.

What is the best professional ultrasonic cavitation machine for a spa?

A professional spa should look at: 

• Cavitation frequency
• Ultrasound strength
• RF specifications
• Vacuum pressure
• Lipo laser specifications
• Included handpieces
• Training & support

Rejuva Fresh options range from adjustable-frequency systems to fixed-frequency options and Fat Blaster machines.

Is 30 kHz or 40 kHz better for cavitation?

Neither frequency is universally better. Rejuva Fresh offers professional equipment using both 30 kHz and 40 kHz, so the better choice depends on the machine's complete configuration and the treatments you want to provide, instead of frequency alone.

What is the difference between 40 kHz and 80 kHz cavitation?

40 kHz and 80 kHz describe two different ultrasonic frequencies. Rejuva Fresh offers both configurations on the Marla™ 9-in-1, so practices can choose the version that fits their needs.

Is RF the same as ultrasonic cavitation?

No. Cavitation uses ultrasound and is typically specified in kHz, while radiofrequency uses electromagnetic energy and is commonly specified in MHz. Multifunction machines can include both technologies through different handpieces.

Is HICMMT the same as cavitation?

No. HICMMT stands for High Intensity Concentrated Magnetic Muscle Training and uses electromagnetic energy to stimulate muscle contractions. Ultrasonic cavitation uses acoustic ultrasound energy, so the technologies have different mechanisms and frequency measurements.

What cavitation frequency does the Eris® 9-in-1 use?

The Eris® 9-in-1 has an adjustable ultrasonic range of 10–100 kHz, and we recommend approximately 20 kHz for the optimized cavitation frequency. Our machine also includes 1 MHz body RF and 5 MHz facial RF.

What specifications should I look at before buying a professional cavitation machine?

Key specifications include:

• Cavitation frequency and ultrasound strength
• RF frequency and power
• Vacuum pressure
• Lipo laser wavelength and output
• Included treatment handpieces
• EMS or other additional technologies
• Training, warranty, and technical assistance

Looking at these specifications together gives a clearer picture of how a machine will fit into your professional practice.