Klarus Mi2, melns

Unique keychain design, convenient, lightweight, weighs only 9 grams, can switch between 2 lighting modes, long-term operation, the low-power mode can run for 24 hours. You can hardly imagine it as a flashlight, it is more like a small accessory, Exquisite and unique. Give it to your friends, take it, just like taking your temperature.

LED: 5mm High-Output LED
Max Output: 40 Lumens.
Working Voltage: 2.5V-4.2V
Battery: 120mAh Li-ion Battery
Waterproof Rating: IPX4
Dimension: 2.19in x 1.01in x 0.38in
Weight: 9.0g (0.32 oz)
Easily-Use Keychain Light
Single silicon button design allows for convenient access, one-click for low mode, double-click for high mode, press and hold can adjust the variation from 1.5 to 40 lumens.
Convenient Pack Light
Mini and lightweight keychain light carry with you, gives you the light you need at any time, no need to worry about having to replace used batteries.
Compact and Lightweight
Merely 0.32oz weight and 2.2in long, similar size with most keys, perfect discreet accessory to any keychain or everyday carry pack.