Rear light with state-of-the-art radar technology. The Magicshine Seemee R300 is more than just a rear light; it's a proactive safety measure. It detects approaching vehicles up to 140 meters away, at speeds between 5 and 100 km/h. This proactive monitoring dramatically reduces the risk of rear-end collisions, whether with speeding vehicles, e-bikes, or casual cyclists, giving you peace of mind on the road. Compatible with ANT+, it identifies approaching vehicles and instantly transmits visual alerts via compatible cycling computers. Maximum output of 300 lumens. ANT+ Radar System. Compatible with most GPS devices and cycling computers. Wide viewing angle: 270º. Visibility of 2400m Maximum autonomy of 100 hours. Maximum detection distance of 140m. PelotonSync Flash technology, compatible with taillights of the same model Weight of 113 gr. Charge via USB Type-C. Seatpost mounting bracket. IPX6 waterproofing.