WindFire&reg; Multi-Function 2 in 1 Super Bright CREE XM-L T6 U2 LED 3 Modes 2000Lm Headlamp Headlight &Bike Bicycle Light with Adjustable Base 18650 Rechargeable Batteries Cree LED Lamp Headlamp Headlight &Bike Bicycle Light with AC Charger and 2 x WindFire 4000mAh Rechargeable Batteries for Camping, Hiking, Climbing, Cycling, Travelling (2Pcs WindFire 18650 Batteries included) Adjustable base is provided for each head lamp, with back and forth inclination. 2 in 1 functions: Bicycle light + Head Light.Output brightness comes to max 2000 lumens. 3 modes: High / Low / Strobe.Bicycle mount is suitable for the handlebars approx 20mm - 26mm. waterproof design, aluminum alloy case, avoiding high temperature, anti fall off. Model of Battery required: 2x 18650 3.7v (Battery Included ) Can be used as a headlamp or bike bicycle light.Wonderful headlamp bike light suitable for outdoor sports, such as camping, traveling, hiking.