portable true stereo speakers 1) Support: Bluetooth, TWS 2) TWS Bluetooth function: support 2 speakers wireless connected, true stereo 3) With charging base 4) Material: Aluminum Alloy + ABS + Silica gel + Métal mesh 5) Battery can support play time: 2-4 hours 6) Speaker size: ? 49.3*46mm 7) Color:Black 8) Support Hand-free when answer calling (with MIC)