Product model: BTA-409 Product color: black/white Interface: USB TYPE-A interface Product material: ABS material Chip: CSR 8510 chip Transmission distance: ≤20 m (more effective transmission within 10 m) Plug and Play: Plug and Play External power supply: no external power supply Transfer rate: 3 (Mbps) Effective working radius: 10 (m) Bluetooth standard: 4.0
