Features: 1. The shoulder strap is detachable, and the length can be adjusted ly, the length can be about 110cm 2. The mesh cover protects the speaker from water, dust, vibration 3. IPX5 waterproof, dustproof and shockproof 4. Cylindrical shape and built-in left and right channs provide 360-degree stereo effect 5. Hands- calling function, noise-cancling microphone, allowing you to answer calls without touching your phone 6. FM function allows you to listen to the radio ly 7. Support TF card, Micro SD card and U disk (not included) 8. Support AUX 9. TWS function, you can connect two speakers to sync with one phone. 10. Simple button control, you can press the button to turn on/off, play/pause, switch modes, skip songs, adjust volume, etc. 11. Bluetooth V5.1, compatible with all Bluetooth devices, wiress distance up to 10m 12. Built-in 3.7V 1500mAh lithium battery, normal volume playback time is about 3 hours Product Specifications: 1. SNR: greater than or equal to 90dB 2. Speaker Driver: Diameter 57mm x 2 3. Power: 4 ohms/5W x 2 4. Frequency response: 120Hz-20KHz 5. Dimensions: 224.2x95x100mm 6. Charging input: 5V/1A 7. Charging time: about 3 hours 8. Weight: about 638g Packing list: Bluetooth speaker x 1 Micro USB charging cable x 1 AUX cable x 1 Shoulder strap x 1 User Manual x 1