COB LED. 1. full aluminum alloy 6061 chassis. 2. automatically switch on / off depending on the light intensity and movement. 3. Automatically switch to sleep mode to save energy. 4. seat rail assembly 5.4 flash modes. 6.20hrs + execution time. 7,400mah li-ion rechargeable battery. 8. USB charging. 9. battery indicator (flashes every 6 seconds) 10. compact and lightweight design (55g). 11. waterproof ipx6.