Feature:  -3-speed adjustment.  -The ergonomic grip minimizes external forces.  -Vibration principle hammering type, powerful massage muscle strength.  -24V brushless motor technology brings a more stable and comfortable experience.  -An Independent power management system makes charging and discharging more intelligent and prolongs battery life.  -High-frequency vibration, eliminate fatigue, perform deep massage, relax muscles and relieve pain.  -A customized ergonomic massage head provides a comfortable massage experience while reducing damage to bones and side limbs. -Four kinds of massage heads, you can choose the massage head according to the massage part, to bring a more comprehensive massage experience.  -The device allows users to directly target sore areas and reduce pain, while also reducing recovery time, making it an indispensable product for any athlete.  -Adjust the frequency according to the purpose for warming up, soreness relief, muscle injury, muscle pain and activation, relief of tightness; increase speed for larger and stronger muscle groups.     Specification:  Color: black / silver / carbon fiber.  Stroke: 12 mm.  Frequency: 4000r / min frequency.  Rated Input: AC 100 ~ 240V 50 / 60Hz.  Life Time: 6 hours.  Number Of Massage Heads: 4.  Battery Capacity: 2600 mAh.  Rated Battery Voltage: DC 16.8V.  Dimensions: 170 x 240 mm.     Package Included:  1 x Electric Massage.  4 X Massage Heads.  1 X Charger.  1 X Storage Box.  1 X User Manual