1) Support: Bluetooth, TWS

2) TWS Bluetooth function: support 2 speakers wireless connected, true stereo 

3) Material: Aluminum Alloy + ABS+ Silica gel + metal mesh

4) Battery can support play time: 2-4 hours  

5) Speaker size: Φ 51.0*46.5mm

6) Colors: Black, Silver, pink, gold

7) Support Hand-free when answer calling (with MIC)