1. Super Standby Time: universal usb rechargeable max standby time can reach up 500hours full charge. 2. Easy Operate: samll LCD with backlight display the unlock time soft and clear 3 small buttons to set hours or minutes easy to use. 3. Metal Body: The Lock body is made of metal Sharp edges and surfaces enhanced textured metal lock.Durability and Security. 4. 99 Hours Timing: Free setting of unlocking time up to 99 hours and 59 miunutes.after the timing is finished the lock ring will open automatically. 5. Improved sleep quality: reduce the time of looking at mobile phones fall asleep early sleep quality enhance immunity and live a Control smoking: limit smoking reduce the number of cigarettes per day gradually extend the interval and cultivate healthy living habits Product Name:Metal Timer Lock Battery: 3.7V/200mA Battery(included) Standby time: more than 500 hours Size: () 45 x 78 x 18mm/1.77 x 3.07 x 0.7inch Lock Type: Keyed Padlock color:Black Material:ABS Package Contents: 1 x Time lock Only the above package content other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is /- 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. Sold by-YJL official store