fanalino posteriore topeak a led rosso redlite aero usb 1wThe super bright, slim, and aerodynamic rear light fits perfectly on aerodynamic round seat posts, vertical stays, or Topeak bags. The rubber strap allows tool free mounting removal and multiple mounting positions. Specifications: Lamp Red COB LED Battery 3. 7 V 650 mAh lithium ion (built in) CHARGE Micro USB Charging time 2 hours CONTROL BURN TIME (approx.) 4 modes 2 hours High beam 4 hours Low beam 15 hours Flashing 50 hours Pulse RESERVE TIME 0. 5