See.Sense ICON Rear Light Daylight Visible - With two CREE LEDs, ICON produces 190 lumens in the rear, making it bright enough to be seen in broad daylight. Intelligent Sensing - monitors the environment, changing flash patterns and brightness to keep you more visible. See.Sense is the ONLY bike light in the world that can react by flashing brighter and faster at roundabouts, road-junctions, approaching car headlights at night, travelling into shade and tunnels. Smartphone Integration - The free iOS & Android App uses Bluetooth Smart connectivity to pair the lights with your smartphone so you can easily check battery level, change from flashing to constant, control multiple ICON's at once, customise brightness & runtime settings and receive low battery notifications. Download Firmware Over-the-Air (FOTA) updates and application updates as new features are released. Crash and Theft Alerts - if you have a crash, ICON can auto notify your nominated contact of your GPS location. Early Theft Deterrent Alarm - instantly notifies you if your bike is moved while you are not with it. Ideal for club cyclists while on a coffee stop. More - Superb runtime at over 15 Hours, recharge via USB, lightweight and compact at under 64 grams (including mount), auto on/off, secure and tool-less mounting, water sealed to IP67 standard.