Features:1. Portable, mini size (7 x 7 x 6.4cm)2. Metal grille, used for waterproof, dustproof and shockproof3. 5W speaker and bass diaphragm, enjoy heavy bass playing music4. Cylindrical and metal speakers provide 360-degree high-fidelity sound5. Call function, eliminate noise microphone, so you can answer the phone without holding the phone6. Support 32GB TF card or Micro SD card7. Support AUX, can connect any audio equipment with 3.5mm interface, such as mobile phone, MP3, MP4, laptop, PC, etc.8. Simple button control, you can press the button to turn on/off, play/pause, switch modes, skip songs, adjust volume, etc.9. Bluetooth 4.0, compatible with all Bluetooth devices10. 650mAh battery can play for 10 hours at two-thirds volume when fully charged11. It is not only a Bluetooth speaker, but also a mini subwoofer, wired speaker and subwooferProduct specification:1. Bluetooth version: 4.02. Bluetooth distance: less than 33 feet3. Support: Bluetooth, TF card, 3.5mm audio input4. Expanded memory: 32GB (not included)5. Battery capacity: 650mAh6. Charging time: 2-3 hours7. Listening/speaking time: 10-12 hours8. Waterproof level: IPX69. Charging parameter: 5V10. Frequency response: 70Hz-20KHz11. Signal to noise ratio: greater than or equal to 90dB12. Material: Metal13. Product size: 7 x 7 x 6.4 cm14. Net weight: 445g15. Support music formats: MP3, wav, wma, Flac, APEPacking list:Bluetooth speaker x 1USB cable x 1