It is very important to follow the video instructions. 98% of the returned Time Lock Safes marked as defective are not, as verified after the return shipping. It's possible to organise a Video Call to set the safe for the first use. This safe needs both 110Volt and 4 AA batteries to work. The power supply has a detachable USB cable that can be plugged in a power supply, a PC or any other USB plug to make it work.