Specifications: Model: AM-667 Type-C Input: 10W 5V/2A Rated Power: 20W (27W MAX) Hot & Cold Strength Level: 3 Gears Use Environment: 0-40°C Battery Capacity: 7.4V 1800mAh Massage Intensity Level: 8 Gears Product Size: 183 x 53 x 160 mm Charging Time: 2.5 Hours Product Weight: 613g Multi Point Massage Head: Suitable for massage of chest. palm, soles of feet, large and small legs and hip muscies. Cat Ear Massage Head: Suitable for massage of convex parts of neck and shoulder. large and small arms, spine and Achilles tendon. Sharp Point Massage Head: Suitable for massage of deep tissue impacting arms, waist and other parts. Airbag Slow Flushing Massage Head : Used for relaxation and shaping massage of the whole body on stress sensitive parts.