Garmin Varia Tail LightOn the road, it's easy to forget that traffic can be threat. We're cautious but sometimes it's not enough. Why not get some extra help from the Varia Tail Light? It's more than just your average light. Pair the Varia Radar with your Edge and you'll unlock features that call for safer conditions. As light conditions change, like charging down a quick descent from a climb, the beam can automatically adjust to a brighter output.Varia Tail Light Features:Automatically adjusts to light condition when paired with light-sensing Edge 1000Works independently and wirelessly integrates with compatible Edge(R) cycling computersAdjustments can be made manually with the use of an included remoteVaria Radar Tail Light Specifications:Dimensions: 1.5" x 3.6" x 0.7 (3.8 cm x 9.2 cm x 1.7 cm)Weight: 1.8 oz (52 g)Modes: Solid, flashingLumens: 22Battery life (high power mode): 4 hoursCharge time: 2 hoursANT+: YesWater rating: IPX7In the Box:Varia tail lightSeat-post quarter-turn mountTail light multi-location quarter-turn mountmicroUSB cableManuals | Garmin Varia Smart Bike Lights - Tail Black, Rear