NiteRider Sentry Aero 260 Rear Light. A super convenient commuter rear light with a versatile mounting system suitable for both aero and standard seat posts Light Modes. Easily toggle between the lights six different light modes which provide a range of flashing and constant modes. Included is a Group Ride mode that provides a specialised beam that will keep you visible whilst minimising distraction for your fellow riders. Meanwhile, the Daylight Visible Flash mode keeps you seen even in direct sunlight Mode One (Flashing): 7 hoursMode Two (Flashing): 6.30 hoursMode Three (Flashing): 7.30 hoursMode Four (Strobing): 6 hoursMode Five: 4.30 hoursMode Six: 30 hoursUSB Rechargeable. The internal lithium-polymer batter is rechargeable and can be charged via any standard USB port using the provided cable. To know when it’s time to charge the light comes with a low battery indicator and the light can be fully recharged in just 2.30 hours Mounting. To mount the light to your bike frame the light comes with two versatile mounting straps: a standard seat post strap and a aero seat post strap. The strap integrates into the design of the light and provides a quick release from your seat post which is ideal for commuters In the Box. LED tail lightStandard seat post strapAero seat post strapUSB charging cableFeatures. 260 lumens of light outputVersatile mounting seat post strapUSB rechargeable lithium-polymerUp to 30 hours of battery life2 30 full recharge timeLow battery indicator6 light modesDaylight Visible Flash and Group Ride modeFL1 standard IP64 dust and water resistanceWeighs 65gBuy NiteRider Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.