Features1Light sensor system, automatically adjust the intensity of light, feel the ambient light, intelligent light sensor chip. 2Sound and light dualwire control, adjust the light mode, control the sound of the horn, more convenient. 3Builtin 2000mah lithium battery, longlasting power storage. A good and wise choice you should make. 4Easy to install and remove, without any professional requirements even though you are an amateur. 5Front light plus speakers, highquality bulbs, highdecibel speakers, you deserve it.SpecificationItem Type: Double-Wire Control Horn LightMaterial: ABSColor: BlackWeight: Approx. 177g / 6.2ozBattery Capacity: 2000mahBattery Type: Lithium Battery (Built-in Battery Shipped)Light: Strong Light, Low Light, Burst FlashEndurance: 3 Hours High Light, 8 Hours Low LightSpeaker Sound: 140 Decibel Tweeter, 5 Sound ModesPackage List1 x Bicycle Light1 x Base1 x Anti-Slip Gasket1 x Wrench1 x Fixed Rubber Ring1 x Data Line1 x Wire Control Button1 x Chinese And English Manual