POD USB (Universal Serial Bus) rear safety light with 15 lumens output Rechargeable Lithium Ion battery 4 modes: Constant high constant low flashing & pulse Black ABS body with 4 coloured heads available Supplied with 2 seatpost adaptors for round or aero fitting Push-lens waterproof switch easy to operate even with winter gloves Amber side visibility lenses Micro USB (Universal Serial Bus) lead included