Often small power is securely built with 3W powerful chip type light. As there is USB port, we can hook up to PC and also charge battery and will use. With a 60 second timer, stress free without worrying about time. After use, the lower limbs may be folded inside for compact storage. How to make use of: Remove the flap. (Will be a stand) The first time you make use of it, the stand could be tough, be mindful. Insert the included cable (mini USB plug edge) into the hookup port on the edge of the key unit. Plug it into the USB port of your PC or USB-AC adapter (sold separately). Press the switch on the top of the key device to light it. It will turn off easily in 60 seconds.