Product details of Portable mini massager deep tissue Therapy to relieve muscle soreness, used for athletes, percussion muscle massager and back massager Product Type: 4 in 1 Mini massage gun Applicable in all Body Variable speed lavel Smooth and Noiseless operation Automation transmission with USB rechargeable system Function: timing control Color: Multi color and random color selection (black/green/red/ silver) Battery Capacity: 2500mah Size: 17.4cmx14cmx4.8cm Material: ABS Working time: 3-4 hours depending us speed control Pls see all indications on box and manuel before use Pls recharge -5-7 hours before first time use Authentic Product