Battery Capacity: 3.7V/200mah Standby time: 500 hours Material:metal colour:Black Package Contents: 4 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Super Standby Time: Universal USB micro-USB rechargeable, Max Standby Time can Reach Up 500hours Once Full Charge. Widely Use: Lock up addictive objects such as , , cell phones or snacks. Suitable for kitchens, gyms, schools. Metal Body: The Lock body is made of high quality metal, edges and smooth surfaces, enhanced textured metal lock.Durability and Security. 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. Easy Operatea: samll LCD with white backlight,display the unlock time soft and clear,3 small buttons to set hours or minutes,easy to use.