Garmin’s Varia RTL515 Radar Tail Light brings an extra level of safety to your rides. Featuring an advanced radar system integrated into a rear light, it pairs with Edge® bike computers or compatible smartphones and alerts you to vehicles approaching from behind. Reliable rearview bike radar lets you ride like you know what’s comingOne radar. Multiple display options. Pair it with your compatible Garmin device, your phone or bothDaylight visibility lets approaching vehicles see you from more than a mile awayUp to 16 hours battery life in day flash modePair with the Varia smartphone app to receive tone and vibration alerts that indicate the position and speed of approaching vehiclesPeloton mode dials it down to a low-intensity flash that is kind to your fellow cyclist’s eyes when riding in a groupCompact in design, it mounts easily to road bike seat posts, allowing for better leg clearance and a comfortable ride