Description MASSAGE: Four-electrode cervical massagers using TENS low-frequency pulse massage technology help blood circulation relieve cervical fatigue. HEATING FUNCTION: The shoulder and neck neck massager provides a constant temperature of 42 degrees. Electric pulse simulation of five traditional massage techniques. EASY TO USE: Electric massagers are started with one button, automatically shut off after 15 minutes of use, protect your safety. After you get our product, you can charge for 2 hours first, then turn on the machine switch, then use the remote control to control the massage. U-SHAPED DESIGN: The soft silicone deep tissue massager features an ergonomic design, portable electronic pressure neck massager for wellness. WARM UP: The smart deep tissue neck massager is a tens massager, not a massager. It uses low frequency pulse therapy. Electric shock may occur during the first use, which is normal.