Ride smart and be more aware of your surroundings with the Garmin Varia RTL50 rearview bike radar. Mounted vertically on the seatpost, it provides visible and audible alerts for vehicles approaching from up to 153 yards (140 metres) away when paired with a dedicated radar display unit or with compatible Garmin Edge bike computers. It comes with a super sleek vertical design that easily mounts to the seat post of most road-use bikes. It has a battery life of up to 15 hours in flashing mode or 6 hours in solid mode. Also, the bright tail light is visible in daylight up to a mile away with 220-degrees of visibility.