EMS (deep muscle training) + TENS (blocking neuralgia signal) double pulse massage. Using the principle of low-frequency pulse to simulate massage techniques, it brings a three-layer massage experience of nerve layer, blood vessel layer and muscle layer. The temperature can be controlled flexibly with 2 levels of temperature control. Hot compress is a commonly used massage technique combined with a constant temperature hot compress of ≈42°C, which can promote blood circulation, relieve the stiffness of the cervical spine, and make the massage effect better and more comfortable. Upgraded floating massage head, 4 electrode pads form a full package, creating a stable fit. It is comfortable to wear and does not affect neck movement. Features: Product name: Cervical Massager Net weight: 90 grams Material: ABS Rated power: 5W Rated voltage: 5V Massage time: 15Min/time Massage modes: five modes Massage intensity: 15 levels adjustable Massage temperature: 42°C Charging time: about 1 hour Size: 158*132mm