Altair Super Bright USB Rechargeable Lightguide Rear Light
USB Rechargeable - Includes USB Cable -Low Batt. Indicator - Battery Capacity Indicator - 3 Red LED - Water resistant - Rechargeable Lithium-Ion polymer battery - Fits Round and Aero Seatposts, seatstays and forks - Bracket from Φ 19mm to Φ 48mm with rubber ring - Constant 3 hrs. - Flashing 1 24 hrs. - Flashing 2 27 hrs - 31gr.