Smart Time Lock with LCD Display, Multifunction Electronic Timer for Travel, Waterproof USB Rechargeable USB lithium battery charging, equipped with screen and 3 small buttons to set hours or minutes, maximum setting time is 99 hours and 59 minutes USB charging supports up to 120 hours of operation When locked, the device cannot be opened manually; set the time appropriately Lightweight padlock design ideal for airport and travel security Secure 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 to insert into the hole and press the reset button 3. When a "Bi" sound is heard (in sound mode), the LCD will display correctly; the timer has been 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