From Manufacturer
Waterproof, impact resistant, measuring under 2" long, and weighing just half an ounce with the battery, the i1R 2 EOS Rechargeable LED Key Chain Light from Olight is the last key chain light you'll ever need.
A small twist of the head activates the low mode, and a further twist changes it to the high output. Keeping with its simplistic design, the custom-designed, rechargeable, 70mAh, 3.7V lithium-ion battery charges via a micro-USB charging port that maintains the waterproof rating without having to disassemble the light to get to the battery. A USB-C charging cable is included.