1. Super Standby Time: universal usb rechargeable, max standby time can reach up 500hours once 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, improve 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 habitsProduct Name:Metal Timer LockBattery: 3.7V/200mA Battery(included)Standby time: more than 500 hoursSize: () 45 x 78 x 18mm/1.77 x 3.07 x 0.7inchLock Type: Keyed Padlockcolor:BlackMaterial:ABSPackage Contents:1 x Time lockOnly the above package content, other products are not included.Note: Light reflection 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 +/- 1-3cm.