1) True wireless stereo (TWS): It allows you to connect 2 speakers via Bluetooth with TWS technology, so they can play at the same time and you can double your audio output.

2) Bluetooth function allows you to wireless connect to your other devices

3) USB or Micro SD&AUX input allows you to connect your non-Bluetooth external audio devices.

4) DC power supply 5V (Charge via DC 5V voltage, USB charging cable included)

5) Frequency response: 90 Hz to 18 kHz

6) Rechargeable lithium battery 3.7 V 1500 mAh

7) Dual 4 Inch high-efficiency woofer

7) 2 Years international warranty