Feature: 1. MUSCLES MASSAGE: Reduces your pain, lumps and muscle tension and simulates a real body massage for the best massage effect. 2. HOT COMPRESS MASSAGE: With 12 gears of strength massage, constant temperature hot compress, adopt intelligent control chip, low energy consumption, high performance. 3. MICROCURRENT PULSE: Neck massager uses low frequency electric pulse massage mode, you may feel an electric vibration when you use it, which is normal, please do not worry. 4. PORTABLE FOLDING DESGIN: Compact and lightweight. Built in a 1800mAh large capacity battery, which allows you to enjoy a comfortable massage. 5. COMFORTBLE TO WEAR: Can fit your neck size and curves better. Made of breathable material, friendly and durable pads to avoid discomfort when wearing. Specification: Item Type: Cervical spine massager Material: ABS, electronic components Size: Approx. 11.2 x 4.3 x 15cm / 4.4 x 1.7 x 5.9in Battery Type: 1 x 18650 lithium battery 3V 1800mAh (built in) Rated Power: 4W. Package List: 1 x Neck massager1 x Manual1 x USB Cable