Unique keychain design, convenient, lightweight, weighs only 9 grams, can switch between 2 lighting modes, long-term operation, low-power mode can run for 24 hours. You can hardly imagine it is.

Product Model No.: Mi2
 LED: 5mm High-Output LED
 Output: 40LM
 Working Voltage: 2.5V-4.2V
 Battery: 120mAh Li-ion Battery
 Weight: 9.0g (0.32 oz)