Item Name: Bike Tail Light Safety Indicator Bright Rear Lamp Bicycle Turn Signal. Lamp bead type: LEDLight color: red light, switch to yellow light100% Brand New and High Quality!Item type: taillight with remote controlProduct size: 94 x 32.5 x 26mmBattery capacity: 500mAh lithium batteryCharging time: 2 hoursDischarge time: 2.5 hoursVoltage: 3.7VFeature:1. 14 red SMD + 18 yellow SMD lights on the left and right side have high brightness, which can effectively remind the traffic behind.2. It supports wireless remote control, which can turn on the corresponding lights according to the road