Built-in 2000mAh battery, rechargeable, it can work for 4 hours under 4.5V voltage when it's full of power and you need to charge it for about 1.5-2 hours.
Cost-effective, made of premium aluminum alloy material, its needle length is 2.5mm, durable for using for a long time.
Powerful motor, adjustable voltage, it working voltage is 8-9V and its working speed is 9000-10000rpm.
Ergonomic design, comfortable to hold, suitable for long-lasting use.
Simple operation, just long press it for 3 seconds to turn it on / off.