New York Toner Xeccon Link Duo USB Rechargeable Road Commuter Bike Light with 1000mAh Battery Bright 600 Lumen output, using 2nd generation Cree XM-L2 LED. Very compact and lightweight road/commuter light, for 25.4-41mm handlebar. Built-in USB rechargeable 1000mAh Battery. With 3 types of strobe function and a sensing function. Up to 10 hours of run time.