... Frequency: 48 kHz Integrating Time: Manual, 10 s, 1 min, 5 min, 10 min, 15 min, 20 min, 30 min, 1h ... ): 1.0V AC RMS Output Impedance: 1 kΩ Connector: φ3.5 mm stereo plug DC Output : 20mV/dB. Output Impedance: 1 k ... graphicsPOWER SUPPLY Batteries: 4 × LR6 Operating Voltage: 4.4 ~ 6.5 V DC Operating current: lower then 120 mABattery Life: ≈20 ...