The 40k and 80k for cavitators refer primarily to the ultrasonic frequencies, which are 40 kilohertz (kHz) and 80 kilohertz (kHz)。 Frequencies around 30kHz to 40kHz tend to produce more audible sounds, which can be noticeable, especially for those sensitive to noise or with tinnitus. This is because lower frequencies fall within the human hearing range, causing a buzzing or ringing sound.In contrast, higher frequencies like 80kHz move outside the typical hearing range, reducing the likelihood of aggravating tinnitus. While 80kHz devices may produce a higher frequency sound, they are generally less audible. For those new to cavitation, both 40kHz and 80kHz devices can seem similar in use. However, if you're sensitive to sound, starting with an 80kHz device might be preferable. It's also worth noting that 40kHz machines are often more affordable. If you're undecided, we recommend starting with a 40kHz device, as it offers a balance between cost and effectiveness. 

Conductive gel is not recommended. The RF head can be used daily, 10 to 15 minutes at a time, until your skin turns slightly pink. Each probe must be used with a product—essential oil, lotion, cream, or gel is acceptable. Do not use the probe dry. 

https://www.freyara.com/warranty 

Hello, It is recommended to choose products with sufficient moisture, such as essential oils, creams, lotions, skin care gels, and ultrasound gels, regardless of brand. It is recommended to use the fat-blasting head three to four times a week, and each time for about 10 minutes on one part. And It is recommended to use the negative pressure head once a week. If you have sha on your back after doing it, do it a second time after recovery. The radio frequency head can be used every day. It is ok if the skin is slightly red. It usually takes 10 to 15 minutes. 

Hello, you can return items if they don't meet your needs. We are currently in contact with Seel, and if you purchase Seel in the future, returns will be free. 

Input voltage: 110-240V Output voltage: 24V Output current: 5A Filler head frequency: 35-40kHz Negative pressure handle: 50-65W Negative pressure intensity: 75-85Kpa Filler head power: 55-70W Four-pole handle: 30-40W Three-pole handle: 20-30W RF output frequency: 1MHz Touchscreen size: 4.3-inch touchscreen Packaging dimensions: 34+31+17 cm 

Yes 

General user feedback indicates the effects are acceptable. However, the actual experience requires personal observation. 

Sorry, we are not currently selling gels. You can purchase them at our physical stores. 

Hello, I don't know which specific model you are asking about. How many 3in1 models are there? You can contact us by email and we will be happy to answer your questions.