The Sona 3-3/4" 500 Lumen Rechargeable USB Flashlight features a 500 MAH rechargeable battery. Fully charging the battery only takes 20 minutes with the included micro USB to USB cable. The 3-stage switch allows users to effortlessly adjust the brightness and the beam size is adjusted by pushing and pulling the flashlight head. The sleek black design also has engraved rings and a wrist strap for a secure grip.