Built-in 1500mAh high capacity battery, it supports about 1 - 2 hours of use per charge. Features: You can use it at home, gym,office. Silicone handle is better to grip, prevent slips and falls from hand. You could treating yourself or others easily. Offer four customized massage heads, provides a relaxing massage experience and reduces bone damage. The handheld designed and 4 attachments allow you to reach every muscle Choose different speed based on your muscle group and your own preferences. Up to 3200 percussion per minute and 4.7inch amplitude provides deep muscle relief, overall recovery, decreasing pain and increasing range of motion. This tool is everything you need to lessen pain, pressure, aor knots and tightness in your body which can result from athletic sports, a gym. workout or any fitness exercise. Specification: Input:110-240V 50/60HZ Rated voltage: DC 8.4V Speed:2000-3600/min Gear position: 1-6 files Endurance: 1-2 hours Mode of operation: button Battery capacity: 1500mAh Full set unit weight:1.4kg pecification:UK Plug Package Included: 1 x Massage gun 4 x Massage head 1 x Instruction manual