Nokia MD-50W. System type: 1.0, Recommended usage: mobile phone/smartphone, Form factor: tabletop. RMS rated power: 2.1 W, Frequency range: 86 - 21000 Hz, Total Harmonic Distortion (THD): 2 %. Connectivity technology: Wired & Wireless, Interface: USB/3.5 mm, Bluetooth profiles: A2DP, AVRCP. Power source type: Battery, Battery type: built-in, Battery life (max): 21 h. Width: 110 mm, Depth: 110 mm, Height: 124 mm