Made to connect directly to your eBike, the Varia eRTL615 is designed to help you stay safe on the road Connects via ANT technology and Low Energy Bluetooth to your smartphone or compatible Garmin device Rearview radar detects vehicles from up to 140 metres (150 yards) away and alerts you to traffic behind you Integrated taillight provides daytime visibility of up to 1.6km (1 mile) away Three light modes include solid, peloton mode, night flash, and day flash Compact design has multiple mounting options with universal seat rail mount or rack/pannier mount 24GHz rearview radar and taillight is battery-free, plugging directly into your eBike Requires compatible Garmin eBike cable (sold separately)