Features: Handlebar Mount: Allows for effortless docking and undocking into the included mounting bracket, specifically designed for bike handlebars. Multiple Playback Sources: Bluetooth-compatible, FM radio, TF card, USB drive, and AUX-in. Choose freely from your favorite listening source. Convenient and safer operation. IPX5 waterproof and dustproof design allows you to take your speaker anywhere. Hands-free Phone Calls: Built-in microphone enables hands-free calling. High Quality: Made from high-quality materials for long-term use. Notice: 1. Actual color may be slightly different from the image due to different lighting conditions. 2. Please allow 1-3 cm deviation due to manual measurement. Material: Plastic Size: 16.4 x 9.7 x 7 cm Transmission range: 10 m Battery capacity: 500 mAh Built-in battery: 3.7 V Working time: 3 hours Power: 5 W Charging: 5 V / 0.5 A Waterproof rating: IPX5