1. In any state press and hold the middle button for 3 seconds to hear a beep to switch between sound mode and silent mode. 2. Locking: Insert one end of the wire rope into the lock hole and when you hear a click the timer will start to lock automatically and the upper right corner of the screen icon displays the locked state.3. Unlock: When the time is the unlock icon is displayed in the upper right corner of the screen. At this time press the guillotine key to take out the wire rope. 3. Set the time: After confirming that the wire rope is inserted into the keyhole press the left button to set the hour press the right button to set the minute press left and right to return to zero at the same time and press the middle lock button to start counting down. 4.There will be a beep for 5 seconds before the timer starts. (In sound mode) press any key to cancel the setting. If there is no key for more than 5 seconds the countdown will start the electronic lock will automatically be locked after a long beep and the lock icon will be displayed on the screen. You cannot unlock by pressing the side unlock button. Only when the timer reaches 00:00 and the unlock icon is displayed on the screen can you press the side button to unlock. Material:ABS Charging voltage: 5V Product size: 7.3x4.72 colour:WhiteBlack Package Contents: 1 x Temporary lockOnly the above package content other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is or - 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.