Adjustable Speed Levels - 5 Speed Settings deliver up to 2500 percussions per minute, LCD screen touch display control, you can easily and intuitively know the remaining power and speed level of the massager .The handle is ergonomically and easy-hold designed so that you can hit hard-to-reach spots. Recovery has never been easier! Lithium-ion Battery And Type-C Charge - M3 offers one of the biggest leaps in the battery life, with an internal lithium-ion battery with 5-8 hours of continuous use.It depends on the speed level and pressure applied during use). Type-c charging ports can be charged by 5V/2A adapter or power bank, providing greater portability. Hidden Vent Design - It can allow the device to dissipate heat better and enhance the durability of the device, and prevent customers from being disturbed by the internal mechanical smell during use. Super Quiet Max noise level is low than 55dB.You can use the massage gun while you're doing other activities like watching television or listening to music, without worrying about being distracted. On the go - Compact and lightweight, it is convenient for you to fits in your bag and carry on travel.