Aluminum alloy, good heat dissipationDifferent indicator lights reflect different statesDurable/Anti-Fall, Long RangeBuilt-in battery, USB Charging, Large capacity batteryHigh Brightness, Low energy consumptiontype: A/BColour:blackMaterial:Aluminum alloySize:100 x 28 x 51mmPackage Contents:1 x bike light1 x USB data cable1 x fixed base1 x wire control strap1 x light/horn controller1 x installation toolOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.