Features1The brake is sensitive, close to naught misjudgment, builtin highprecision sensor, and depth algorithm, even if the brakes are slightly braked, the taillights can quickly detect. 2The horizontal angle adaptive taillights, can horizontally correct the up and down slopes during riding according to the different angles of the sitting rod, and the automatic horizontal correction, can maintain the accuracy of braking at all times. 3When the surrounding light is dark, move the bicycle slightly, and the tail light will turn on immediately. If the bicycle is not moved within 45 seconds, the tail light will automatically go out. 4The optimized program algorithm can filter small rolling motions and small bumpy road sections. However, the brake light warning will still be activated if the damping belt is too large. 533.5 hours long battery life, 2 hours and 20 minutes full power, the brightest battery life is 10.5 hours, the longest battery life is 33.5 hours, and the standby time is up to one year.SpecificationItem type:BikeIntelligentBrakeTaillightMaterial:Aluminum alloy, ABS/PCColor: As picture shownWeight: Approx. 90gWorking mode: automatic mode/manual modeManual mode: manual control switch lights, with brake sensor function.Automatic mode: light sensor start and stop, mobile start and stop, induction brake. In the automatic mode, the tail light is off and the brake sensor function is still available.Installation method: seat tube/cushionLight mode: constant light / breathing flash / slow flash / fast flash / rhythm flash / ECO flashCharging input: DC5V-280mAhCharging time: about 2 hours and 20 minutesBattery: polymer battery, 420mAh/1.554Wh, 3.7VWaterproof rating: IPX6Constant brightness: 46 lmPackage List1 x Instruction1 x Tail light4 x Cable tie1 xCable tiefixed base2 x Gasket1 x Cushion bracket1 x USB charging cable1 x Fixing screw