5 Pack of Nitecore Tube T Series 45 Lumens USB Rechargeable Key Chain Flashlight with a 25 Lumens Lumen Tactical Keychain Light (Five Colors) Bright 45 Lumens Nitecore Tube Keychain Flashlight Built-in Rechargeable battery and USB charger Single click for low and double click for high, and 1-45 Lumens variable brightness. Also include a 25 Lumens Lumen Tactical key chain flashlight. Lumen Tactical keychain light comes with on/off and momentary on switch. Use 2x CR2016 or 1x CR2032