5W Bluetooth speaker with a soft diaphragm for clear audio playback. It supports multiple music inputs such as TF card, U-Disk, and AUX-in. The built-in microphone allows you to answer calls directly during cycling. Operation is managed through multi-functional keys. If the maximum volume of the speaker is insufficient, please adjust the volume on your connected mobile phone or other device. A patented clamping mechanism to securely hold your phone. It remains firmly in place during cycling and can be adjusted in width and height to accommodate phones from 3.5 to 7 inches, making it compatible with most cellphones. Includes 3 lighting modes. Click the button to start, double-click in any mode to activate flashing mode, and press again to turn off the flashing. The light provides a running time of approximately 6-7 hours and is controlled using multi-functional keys. Can reach up to 120 dB and offers 3 sound modes for selection. The volume of the horn is adjustable and its compact size allows for convenient use during cycling. Built-in 5000mAh battery supports approximately 6-7 hours of continuous light operation and 12-15 hours of continuous music playback. When using both functions simultaneously, the device provides about 4-5 hours of continuous usage for cycling. Weighs 330g and measures 155x57x34mm. The mount is designed to fit handlebars from 1 inch (25.4mm) to 1.25 inches (31.8mm), including curved, straight, butterfly, and goose handlebars. It is not suitable for flat or non-standard handlebars. Please verify your handlebar type before purchasing. For any questions about this product or if you require assistance with its use, please contact our after-sales support team through Amazon for guidance and instructions. UPPEL Bike Speaker Phone Holder - Bicycle Headlight, Horn, Microphone, for Mountain and Road Cycling