Fenix BC30 1800 Lumen LED Bike Light, Dual Distance Beam Bicycle Flashlight with 4 X LegionArms CR123 Batteries Utilitized two Cree XM-L2 neutral white LEDs, Dual Distance Beam system with Max 1800 lumens Instant burst with the remote pressure switch Quick attach and detach handlebar mount (included), sized for 22mm - 35mm handlebars Water resistance to IPX-6 standard; Operates on two 18650 or four CR123A batteries Bundle includes four LegionArms CR123A lithium batteries