Using the Miniware ES15S electric screwdriver is easy. First, charge it using the USB - C port for 90 minutes. Once charged, pick the right screwdriver bit from the 24 - piece set and insert it into the 4mm socket. To operate, just give a small twist of your thumb thanks to the motion control feature. You can see the operating status on the OLED screen. When not in use, store it in a dry place. Don't expose it to extreme temperatures or moisture. Clean the screwdriver bits regularly with a soft cloth. Also, avoid over - tightening screws as it may damage the tool. If the battery runs out quickly, it might need to be replaced after a long time of use.