Features:  1. Multi-functional 4-in-1: The bicycle light has a four-in-one multi-functional upgrade design, which can replace daily and troublesome bicycle accessories, including high-brightness bicycle 2*LED light/2800mAh USB rechargeable lithium battery which can be used as a power bank /high decibel Speaker/bicycle phone holder.  2. Highlight 2 lamp beads and 5 lighting modes: highlight 2 T6 LED, the five lighting modes can be changed at any time, to ensure safe driving at night The speaker has 5 sound modes, up to 130 dB. Sealed and waterproof to ensure the safety of the phone when charging.  3. USB charging, two-way USB interface, this is a portable power bank, very practical for cyclists, you can charge your mobile phone while driving. Built-in 2800mA USB rechargeable lithium battery.   4. Compatible with most devices: the width is 50-80 mm, and the adjustable clip is compatible with other smartphones under 6.3 inches.  5. Easy installation: It can be easily installed without tools, suitable for most vehicle handlebars, such as motorcycles/mountain bikes/mountain bikes/electric bikes/foldable bikes/scooters, etc.    Specification:  Brightness:400lm;  Battery capacity:2800mAh;  Endurance:6-12h;  Light mode:5 kinds (strong light - low light - burst flash - yellow light - yellow light flash);  Light beads:2xT6;  Suitable for cell phones:4-6.3inch;  Decibel:130dB;  Sound mode:5 kinds of sound mode;  Charging:USB dual interface;  Waterproof:Life waterproof;  Weight:300g;    Package included:  1 x Bike Highlight;  1 x Bike Horn;  1 x USB Cable