99 HOURS ?? - The maximum time is 99 hours and 59 minutes. Lock once you setting and starting it, after time run out it will unlock and open automatically. Please set the time reasonably. FINE METAL BODY ?? The lock body uses long-lasting aircraft metal . Made by good craftsmanship with smooth edges and enhanced textures. LCD SCREEN | EASY USE ?? - With sound when setting and the time counts down to zero the lock will alarming. You can also select silent mode .Upgrade USB rechargeable, once charge can standby 500 hours. Besides the original charging cable, you can quickly find a compatible charging cable to charge it. Delivery Quantity: Electronic Lock*1, USBData Cable*1 Product color: as pictured Notice: *Actual color may be slightly different from the image due to different monitor and light effect *Please allow 1-3cm deviation due to manual measurement