Features1With Turn Signal: This bike warning tail light has left and right turn signals to inform the vehicles behind, making it safer to ride at night. 2Remote Control: The turn signal tail light can be opened and operated by remote control, which is more convenient. 3USB Rechargeable: Built in large capacity battery, can be used for a long time, and can be charged through USB cable, very portable. 45 Modes: The tail light support 5 modes, which are right turn light on and high decibel speaker, left turn light on and high decibel speaker, red light always on, red light flashing, all lights flashing. 5Water Proof: Water resistance makes this bike turn signal lamp can be used in moderate and small rain of 4 to 140, ideal for outdoor cycling.SpecificationItem Type: Bike Turn Signal LightMaterial: PPSize: Remote Control: Approx. 42x54mm/1.7x2.1inTurn Signal Lamp: Approx. 92x32.5mm/3.6x1.3inColor: BlackBattery Type: 3.7V 900mAh lithium battery (built in)Package List1 x Bike Turn Signal Light1 x Controller1 x Charging Cable1 x Lamp Rubber Bracket1 x Controller Rubber Ring