This rearview radar pairs with your Edge® bike computer or compatible smartphone to alert you of vehicles approaching from behind. Varia™ RVR315 rearview radar provides visual and audible alerts for vehicles approaching from behind up to 140 metres away. When used with a compatible smartphone, Varia radar integrates with your favourite apps, such as Ride with GPS to overlay your maps with rearview radar alerts. This radar works seamlessly with your Edge bike computer or compatible smartphone as well as select Garmin wearables. Easily mount this sleek, compact device on the seatpost of almost any road-use bicycle. The vertical design allows for better leg clearance and a perfectly comfortable ride. This smartphone app helps you increase your awareness by providing graphics - plus tone and vibration alerts - to indicate the position and speed of approaching cars. Key FeaturesReliable rearview radar lets you ride like you know what\\\'s coming. One radar. Multiple display options. Pair it with your compatible Garmin device, your phone or both. Don\\\'t have an Edge® or other compatible device yet? No problem. The Varia™ app has you covered. Get more life out of your radar with up to 7 hours of battery life. About GarminGarmin GPS is the world\\\'s leading mobile navigation technology company and a global manufacturer of in-car sat navs, portable navigation devices, handheld GPS units, and GPS products such asthe Garmin Forerunner & Garmin Edge. The Edge comes in a variety of forms, offering the perfect GPS unit for MTB or Road. From the basic Edge 530, to the advanced Edge 830 Performance Bundle. Garmin\\\'s watch range offers a variety of products for all types of athletes including GPS sport watches and fitness trackers. The Garmin Forerunner offers an easy and fun way to keep track of your activities, and work towards those goals. The Garmin Fenix is for athletes who demand more from their watch, including multisport GPS navigation, a wrist-based heart rate monitor and advanced training features. Technology Buying Guide