Smart Time Lock with LCD Display, Multifunction Electronic Timer for Travel, Waterproof and USB Rechargeable USB lithium battery powered with screen and three control buttons to set hours and minutes. Maximum setting time is 99 hours and 59 minutes. Fully charged via USB, the battery lasts up to 120 hours. When locked, the device cannot be opened manually. Set the timer appropriately for security. The combination padlock is lightweight and suitable for airport and travel use. Secure your personal items 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 and insert it into the reset hole. 3. When a "Bi" sound is heard (in sound mode), the LCD will display correctly. The timer has been reset successfully. 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 between the image and actual item. Measurement may vary by +/- 1-3cm.