If you purchase two speaker, they can be connected and the sound effect will be better.
How to interconnect two speakers
1.First, power on both speakers and switch to Bluetooth mode.
2.Press and hold the mode button on the left speaker for about 3 seconds before releasing.
3. in general, after waiting for 10 seconds, the main box will be connected to the secondary box.
4. When TWS is connected, long press the mode button of one of the speakers for 2 seconds to disconnect. The mainbox wil automaticaly connect to the secondary box after the next power on.