The nebula front light provides 240 lumens of light from a compact and lightweight design 1 pce 30 chip rectangualr ring cob high brigtness ld recahrgeable lithium polymewr battery 37c 800 mah cnc aluminium heat sink micro usb remote switch over hating protection system 8 modes quick release patented universal bracket fits all round and aero style bars 2 x o rings 20 35mm amp 25 52mm low battery charging amp fully charged indicator automatic fully charged cut off system side visibil