I'm very sensitive to ems (electro muscle stimulation) and usually find it painful. If you're looking for a massaging, heating (only with red led light therapy) metal gua sha with vibration (sonic) massage, this is good.

It does remove puffiness and fluid buildup under skin. There’s three modes:1. Blue ray mode ( eliminate, acne and tighten pores )2. Green light mode.

Red light just keeps blinking. No instructions and no box. Wouldn't recommend to anyone.