Four-in-one functionIt's not only a bicycle light, but also a loud horn and a bicycle mobile phone holder. It can also be used as a temporary power source when charging is needed for outdoor riding. Four-in-one functionIt's not only a bicycle light, but also a loud horn and a bicycle mobile phone holder. It can also be used as a temporary power source when charging needs for outdoor driving are needed.Light Modes and HornThe bicycle light has 3 light modes with different brightness. The horn with 5 sound modes is equipped with a USB key switch. (Press and hold the switch for 4 seconds to change the horn mode.)Light Modes and HornThe bicycle light has 3 light modes with different brightness. The horn with 5 sound modes is equipped with a USB key switch. (Press and hold the switch for 4 seconds to change the horn mode.)Practical Bicycle LightSuper bright bicycle light with 2 T6 bulbs, power bank, 4000 mAh large-capacity lithium battery, battery level indicator and 3 lighting modes to choose from. This is a very practical bicycle light for night riding. Practical Bicycle LightSuper bright bicycle light with 2 T6 bulbs, power bank, 4000 mAh large-capacity lithium battery, battery level indicator and 3 lighting modes to choose from. This is a very practical bicycle light for night riding.Universal Bicycle Phone HolderUniversal bicycle phone holder with adjustable width, suitable for mobile phones from 4-6.4 inches. Built-in 130 decibel bicycle bell, just press a button to warn others in an emergency. Universal Bicycle Phone HolderUniversal bicycle phone holder with adjustable width, suitable for mobile phones from 4-6.4 inches. Integrated 130 decibel bicycle bell, just press a button to warn others in an emergency.New Base DesignEasy to install and remove, no additional tools required. Even after a long ride, your bike light is still firmly fixed on the handlebar. New Base DesignEasy to install and remove, no additional tools required. Even after a long ride, your bike light is still firmly fixed on the handlebar.qq