1. power supply mode: USB
<br />2. power supply mode: built in lithium battery
<br />3. colors: black, gold, silver, rose gold
<br />4. frequency response range: 100HZ-20KHZ
<br />5. output power: 3W
<br />6. connection: Bluetooth connection
<br />7. interface type: USB
<br />8. packing list: machines, instructions in Chinese and English, charging lines
<br />9. display: None
<br />10. speakers: single horn
<br />11. appearance size: 80*30 mm
<br />12. speaker adjustment: button
<br />13. box material: aluminum alloy
<br />14. battery capacity: 400 Ma polymer
<br />15. shell material: Metal
<br />16. operation mode: press key
<br />17. function: call function, voice prompt
<br />18., play time: 3 hours or so
<br />19. effective distance: 15 meters
<br />20. type: Bluetooth speakers