Features 1. EMS Massager Relief Pad works effectively with chronic pain or sore muscles. Apply the pads to the needed area on your body, and adjust the level to your need and get your pain relief. 2. Automatic shutdown in 15 minutes, automatic shutdown in 30s without touching the skin, to ensure the safety of the back massager in use. Remote controller design, more convenient to control, the elderly can also use it with confidence. 3. Mini Neck and Back Massager have 8 modes neck massage and 18 levels intensity to choose from. Users can select the appropriate mode according to personal needs,for beginners, it is recommended to start with the lowest intensity. 4. Never worry about need to replace dead batteries as it is USB rechargeable.Mini massager can be used for 20 times(15minutes for one use) after charging for 1 Hours. Can be easily powered by any wall chargers, power banks, laptops and USB adapters. 5. Widely Applicable: The mini cervical massager can also be widely applied to different body parts, such as shoulders, lower back, calf, legs, foot. Relaxation gifts for men, women. Specification Material: PU Color: Black Size: 20.3 x 13.3 x 4.2 cm Weight: 165 g, 200 g Working Current: 9.8ma Working Voltage: 3.7V Working Frequency: 1-100Hz Recommended Ambient Temperature: 10-40C Quiescent Current: Less Than 10A (measured 3.7A) Package Include: 1x EMS Cervical Massage Patch 1x USB Charger or 1x EMS Cervical Massage Patch 1x USB Charger 1x Remote Controller