USB rechargeable lithium battery with LCD screen and 3 buttons to set time, maximum setting time is 99 hours and 59 minutes. USB charging provides up to 120 hours of operation. When locked, the padlock remains secure and cannot be opened manually. Set the time appropriately for optimal use. Lightweight combination padlock designed for travel and airport safety. Secure your valuables anytime to protect privacy. How to reset the timer lock: 1. Press the center of the LCD screen to remove the protective film. Locate the reset hole under the screw on the left side of the screen. 2. Use a metal pin or clip to insert into the hole and press the reset button inside. 3. When a "Beep" sound is heard (in sound mode), the LCD will display correctly. The timer has been successfully reset. 4. Reapply the protective film. Weight: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: Light and display differences may cause slight color variation from the actual item. Measurement error allowed is +/- 1-3 cm.