2 pcs high brightness red LED. CNC Aluminium heat sink casing. Auto safe mode. Mode memory function. Rechargeable lithium polymer battery (3.7V 300 mAh). 7 modes: Mode1 / Mode2 / Mode3 / FL 1 / FL 2 / ALT FL / DAY FLASH (DOUBLE BLAST). Quick release universal bracket RB-22 (fits all round bars and AERO style bars). Low battery, charging and fully charged indicator. Automatic fully charged cut-off system. Side visibility. Water resistant (IPX 4).