A. This product is a portable and rechargeable nail and foot beauty machine. It uses a brushless motor with a rotation speed of up to 40,000 revolutions per minute. It can be used for about 32 hours on a single charge. The brushless nail drill consists of an electromagnetic motor (operated by magnets). These motors have no brushes, which can reduce friction and the noise generated by the nail grinding head. It may also extend the service life of the nail drill grinding head by promoting heat dissipation and reducing maintenance requirements. If you're looking for a nail drill that can be used for a long time without being replaced due to motor damage, this could be a good choice for you. This nail drill is useful for nail maintenance and trimming. It can be used to lift and repair cracks in acrylic nails, treat cuticles, polish natural nails, and sand calluses or hard skin on the hands or feet. The approximately 32 - hour battery life on a single charge allows you to use this nail drill without frequent recharging. The set includes various grinding heads and sanding sheets, as well as a stand for placing the machine and accessories. B. Product features - Brushless motor: Different from some standard nail drills, this machine is equipped with a brushless motor, which provides relatively precise control and torque, and may avoid occasional shutdowns when appropriate pressure is applied. - Rotation speed: The rotation speed is 40,000 revolutions per minute. It can work relatively smoothly on acrylic nails, dip powder nails, and calluses on the hands or feet. - Memory function: The nail drill machine will automatically remember the speed setting you used last time. - Forward and reverse rotation (suitable for both left - and right - handed users): It has a forward and reverse operation switch and can be used by both left - and right - handed people. - Pause function: Press the pause button at a specific rotation speed. When you press the pause button again, the nail drill machine will continue to run at the same speed. - VA high - definition display: A large high - definition screen can display the rotation speed setting and battery level. - Long battery life: It can be used for about 32 hours on a single charge. - Power bank function: Equipped with a USB interface, this machine can also be used as a power bank for some electronic products. - Two - in - one storage box: The storage box can also serve as a stand. There is enough space to hold the nail drill handle, battery machine, and nail drill bits. C. Product specifications - Power: 4000 mAh - Rotation speed: 40,000 revolutions per minute - Battery: Polymer battery, can work for about 32 hours on a single full charge (takes about 5 hours to fully charge) - Optional colors: Black, silver, or gray D. Package contents - 1 nail machine battery pack - 1 brushless motor grinding head - 1 two - in - one storage box and nail drill stand - 6 drill bits - 6 sanding sheets