About the TraceR Rear Light with DayBright - 75 Lumen The TraceR is a super bright USB charging rear light. Its compact design, high power, wide angle visibility and ultra-reliability have made it an award winning product. Featuring Optimum Mode Selector with 3 levels of brightness, USB charging, fuel gauge and a simple single button operation, make this a great light for all situations. There are now more cars on the road than ever and modern motoring life is full of distractions - radio, satellite navigation, and hands free mobile phones to name a few… 80% of all traffic accidents involving cyclists occur during the daytime. The new Day Bright pulse pattern is designed to cut through the distractions of busy roads and visual noise in modern motoring and is visible from over a kilometre away, even in the brightest of sunlight. Key Features Light Source: LED Brightness: 75 Lumens Power Source: 700mAh Rechargeable - USB / Wall socket - Micro USB charging Run Time High - 3hr Low - 24hrs (Pulsing) Charge Time: 3hrs Mounting: Seat post - Tool free Light modes: 3 Modes Dimensions: 57mm (L) x 28mm (D) Front/Rear/Set: Rear Extra Features - Cable Free Design - Day Bright Mode - Intelligent Thermal Management - Optimum Mode Selector - Fuel Gauge Weight 35g Lighting Buying Guide