1. Bike-mounted Design: The speaker is designed to be mounted on a bike conveniently. It can be easily fixed onto the bicycle handlebars or frame without using additional brackets. 2. Bluetooth-compatible Connectivity: With Bluetooth-compatible connectivity feature, the speaker can connect to your phone, tablet, or other devices. Enjoy high-quality music and wireless radio reception while riding your bike. 3. High-Quality Sound: The bike Bluetooth-compatible speaker provides clear and powerful sound quality, whether playing music or listening to the radio. You can enjoy an excellent audio experience while riding your bike. 4. Waterproof Design: Waterproof design allows for use in damp or rainy conditions without worrying about damage from water exposure. 5. Multi-functionality: The speaker supports FM radio reception, enabling it to function as a radio station for added convenience. Specification: Audio battery: 500mAh polymer battery (includes battery) Usage time: about 3h Charging method: Type-C USB charging Radio function description: After turning on the phone, m to switch to fm. If you need to strengthen the signal, you need to connect the audio cable to the speaker and switch to the radio function. The sound effect be much better this way Color: Grey Material: plastic Package Contents: 1 x Bluetooth speaker 1 x Charging cable 1 x Chinese and English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.