Conceptronic BJORN 2.0-Channel Computer Speaker with Bluetooth, 10W, 2-way, 2.0 channels, Wired & Wireless, 10 W, 140 - 13000 Hz, Black Conceptronic BJORN 2.0-Channel Computer Speaker with Bluetooth, 10W. Recommended usage: PC. Speaker type: 2-way, Audio output channels: 2.0 channels, Number of drivers: 2. Connectivity technology: Wired & Wireless. RMS rated power: 10 W, Frequency range: 140 - 13000 Hz, Impedance: 3 Ω. Product colour: Black