Technical Specifications Model: WS161 Amplifier: 50W X 2 Channel Stereo Power Supply: 24V / 3.5A (84W) Power Voltage: 100-240V - 50 / 60Hz Wireless Network: IEEE 802.11b / g / n Wireless Network Frequency: 2.4 GHz Security Protocol: WEP / WPA / WPA2 Bluetooth Version: VPA2 4.2 B R/EDR compliant Bluetooth frequency: 2.4 GHz Bluetooth range: 10 meters (sight line) Bluetooth transmitter power: 0 dBm Audio input: 3.5 mm stereo jack / Optical (Toslink) and coaxial digital input Audio output: RCA jack External WiFi / Bluetooth antenna Unit dimensions: 21.8 x 24.2 x 7.0 CM(L x D x H)