Great safety light which mounts to any helmet with two front white leds and 2 rear red leds for all round visibility 3 modes white constant red blinking white blinking red blinking white constant red constant wide angle 220 reflective lens 65x35x3cm k 18g bulb 2x white leds and 2x red leds battery lithium cr2032 x2pcs luminious intensity 1 lux5m06 lux10m burn time 70hrs100hrs