[HIGH TRANSMISSION EFFICIENCY] - Automatic transmission, high efficiency. In the natural state, using automatic transmission, it is convenient to tighten the screws. [BUILT-IN CURRENT DETECTION FUNCTION] - When the machine is close to the power supply current , the light and sound will remind you. [SERVING AS A Wire Stripper] - You can easily strip the wire, as a wire stripper, there is a small hole in the middle of the screwdriver, which can easily bend the wire, saving time and effort. [COMFORTABLE TO HOLD] - LED work light, darkness does not affect work, does not work for a long time [OCCASIONALLY REQUIRES MANUAL OPERATION] - When the screw tightening torque is not strong enough, manual operation is required. Product Feature: [HIGH TRANSMISSION EFFICIENCY] - Automatic transmission, high efficiency. In the natural state, using automatic transmission, it is convenient to tighten the screws. [BUILT-IN CURRENT DETECTION FUNCTION] - When the machine is close to the power supply current , the light and sound will remind you. [SERVING AS A Wire Stripper] - You can easily strip the wire, as a wire stripper, there is a small hole in the middle of the screwdriver, which can easily bend the wire, saving time and effort. [COMFORTABLE TO HOLD] - LED work light, darkness does not affect work, does not work for a long time [OCCASIONALLY REQUIRES MANUAL OPERATION] - When the screw tightening torque is not strong enough, manual operation is required. Specification: Type supply voltage: rechargeable lithium battery technology Supply voltage: 4V Field of application: home improvement, locomotives, model airplanes Package: 1 * Electric Screwdriver 1 * USB Charging Cable 41*lot 1 * Toolbox