1). LED Lamp: 2xCREE XM-L U2 LEDs 2). Luminous Flux: 2200 Lumens 3). LED Lifespan: 50,000 hours 4). 2 End Cap Switch With Voltage Indicator: *Green Switch: control 10%-40%-70%-100% modes *Orange Switch: control strobe mode only( it will turn to be strobe anytime when you press this button) 5). Modes: light 10%, 40%, 70%, 100%, strobe 6). 3 Colors (green, blue, red) changing on switch to indicate different battery power status 7). Battery: 6-cell battery pack, 6600mAh, 8.4V, waterproof with silicon rubber cover 9). The O-ring Mount: green luminous 10). Body Material: hard oxidation, 6061-T6 Aluminum alloy housing, anodized antiabrasive finish. 11). Weight Of Lamp: 0.1KG (0.85KG/set) 12). Used as bike light & headlamp or helmet light 13). CE, RoHS approved 14). Each set come with bike lamp, 6-cell battery pack, battery pouch, charger, 2 x O-ring mount,headband/ helmet band Each packed into the gift box, 18sets into one carton.