Usage Tips:99 Hours Timing: Free setting of unlocking time, up to 99 hours and 59 miunutesafter the timing is finished, the lock ring will open automatically. Metal Body: The Lock body is made of high quality metal,Sharp edges and smooth surfaces, enhanced textured metal lockDurability and Security. 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. Super Standby Time: Universal USB -USB rechargeable, Max Standby Time can Reach Up 500hours Once Full Charge. Widely Use: Lock up addictive objects such as cigarettes, drugs, cell phones or snacks. Suitable for kitchens, gyms, schools. Battery Capacity: 37V/200mah Standby time: Greater than 500 hours Material:metal colour:Black Package Contents: 1 x Time lock Only the above package content, other products are not included. Note: Light 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.