The Blinder R-150 Rear Bike Light is a purpose-built light designed for road cyclists looking for maximum visibility over distance. Featuring two unique design elements that effectively aid visibility from afar: a strobe LED and a dedicated angle set LED. Both these features have been designed to highlight riders to other roads users, particularly at a long distance. WEIGHT: 40g Super bright 150 lumen output. A lightweight 40 grams. 9 eye-catching modes. 100% waterproof with IP67 rating. Side illumination via lens geometry. USB rechargeable battery. Integrated USB-A connector (cable-free). Up to 50 hr runtime. Compatible with standard & aero seat posts. Low battery & charge indicator. MULTI-CHANNEL LED'S AND FLASH PATTERNS Through its use of advanced COB LED tech & dedicated lighting channels, Blinder R-150 creates visual patterns that are impossible to miss. USB RECHARGING VIA INTEGRATED CONNECTOR There is no requirement for single use batteries or charging cables. Full recharged from flat achieved in 3 hours. DEDICATED STROBE LED The R-150s exceptional visibility is aided via a dedicated strobe LED set on a deliberate angel of 12° so it's always grabbing maximum attention. CHARGE AND LOW BATTERY INDICATOR An LED around the button glows green when charging & turns off when charged. This same LED lights up red when your light dips below 10% charge remaining.