Power Source 100 - 240 V AC, 50/60 Hz (use of the supplied AC adapter), Power Consumption 72 W, Current Consumption Max. 3 A DC (when 24 V DC is supplied from the accessory AC adapter), Carrier Frequency Reception: (Audio Channel 1: 7.35 MHz, Audio Channel 2: 8.10 MHz, Audio Channel 3: 8.55 MHz, Audio Channel 4: 9.15 MHz, Control Channel: 6.45 MHz), Transmission: Audio Channel: 1.95 MHz,Translation Language Channel: 2.25 MHz, Input MIC 1 (Base Language): -60 dB*, 600 Ω, unbalanced, Ø 6.3mm phone jack (2P), MIC 2 (Translation Language): -60 dB*, 600 Ω, unbalanced, Ø 6.3mm phone jack (2P), AUX 1 (Base Language): -20 dB*, 10 kΩ, unbalanced, Ø 6.3mm phone jack (2P), AUX 2 (Translation Language): -20 dB*, 10 kΩ, unbalanced, Ø 6.3mm phone jack (2P), AUX 3 (Base and Translation Language): -20 dB*, 10 kΩ, unbalanced, Ø 6.3mm phone jack (2P),Output LINE: -10 dB*, 10 kΩ, unbalanced, Ø 6.3mm phone jack (2P), REC: -10 dB*, 10 kΩ, unbalanced, RCA pin jack, HEADPHONE: Ø 3.5mm mini jack (3P: monaural)