The Mi2 is a keychain light that comes in three colors, shooting up to 40 lumens from a single LED powered by a built-in li-ion battery. The light uses a single side switch for control, with clicking once to turn it on/off. Holding the switch automatically changes the brightness, from the max 40 lumens to a minimum 1.5 lumens and is able to stop anywhere between.

Specifications:

• Manufacturer's page: Klarus Mi2
• LED: 5mm High-Output LED
• Output: 40~1.5 lumens/24hr (max)
• Beam distance: 12m
• Working Voltage: 2.5V-4.2V
• Battery: 120mAh Li-ion
• Weight: 9.0g (0.32oz)
• Dimensions:
  Length: 55.6mm (2.19”)
  Width: 25.7mm (1.01”)
  Height: 9.6mm (0.38”)