- Detects when you are braking to emit a bright light alerting others you're stopping - Max 150 lumens / 57 hour runtime in Flash mode - New 800 mAh battery. Larger battery, longer runtimes - New mounting style to fit shorter seat posts with USB plug and cable - Wide-angle optics with 270 visibility for maximum safety - Aero seat post compatible - Lightweight and durable - IPX7 water-resistant co-molded design