Specification   Power Source AC mains, 50/60 Hz (supplied from the included AC adapter (*1)) Power Consumption Max. 2 A Charging Time Max. 3 h Number of Wireless Microphone to be Charged Simultaneously 2 pieces (*2) Operating Temperature 0 ℃ to +40 ℃ (32 ゜F to 104 ゜F) Operating Humidity

Specification   Battery IR-200BT-2 rechargeable battery for the infrared wireless microphone (option) or AA alkaline dry cell battery (2 pieces). Current Consumption Typ. 250 mA (2.4 V, Power selector switch: N) Typ. 340 mA (2.4 V, Power selector switch: H) Infrared Emitter Wavelength 870 nm (AM: Brightness modulation) Modulation Method

Specification   Power Source 24 V DC (supplied from the IR-702T) Current Consumption Max. 30 mA Infrared Detector Wavelength 870 nm Carrier Frequency Channel A: 3.100 MHz Channel B: 3.350 MHz Communication Area Approx. 15 m (50 ft) in a space without any obstacles   Connection Terminal 75 Ω, BNC

Specification *0 dB = 1 V Power Source 230 V AC, 50/60 Hz (supplied AC adapter must be used) Power Consumption 8 W (based on UL standards) Max. 40.8 W (rated output at IR-820SP) Receiving Frequency Teacher (Channel A): 3.100 MHz Student (Channel B): 3.350 MHz Receiver Sensitivity 50 dB