| Input Section | Constant current power supply | 2.4 mA ( ±20%) / applied voltage : approx. 18V | 
        
            | Number of channels | 2 | 
        
            | Operating frequency range | 1 Hz to 20 kHz  (±0.5 dB) , load impedance 100 kΩ or more | 
        
            | Input impedance | 1 MΩ ±0.5 % | 
        
            | Input cutoff frequency | Approx. 0.16 Hz | 
        
            | Input voltage range | 12.5 dBVrms or less (± 6V) | 
        
            | Gain | -10, 0, 10, 20, 30, 40, 50, 60 dB in 10-dB step, selectable, ± 0.2 dB | 
        
            | Frequency weighting | A/C/FLAT (conforming standards: IEC 651 Type 1, JIS C 1505-1988) | 
        
            | Output cutoff frequency | approx. 0.2 Hz (load impedance : 100kΩ or more) approx. 0.4 Hz (load impedance : 50kΩ or more.)
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            | Input-converted self noise | A | -105 dBVrms or less | 
        
            | C | -100 dBVrms or less | 
        
            | FLAT | -95 dBVrms or less | 
        
            | Input / output connectors | BNC | 
        
            | Output Section | Output voltage | 12.6 dBVrms or less (±6V) | 
        
            | Max. output cable length | 30 m | 
        
            | General | Power supply | Type AA battery x 4 External power supply: PB-7090* AC adaptor (option)
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            | Battery life | Approx. 20 hours min. (with alkaline battery) | 
        
            | Operating temperature range | -10 to +50°C | 
        
            | Operating humidity range | 30 to 90 % RH (with no condensation) | 
        
            | Storage temperature range | -20 to +60°C | 
        
            | Storage humidity range | 10 to 90 % RH (with no condensation) | 
        
            | Outer dimensions | 140 (W) x 40 (H) x 125 (D) mm (not including protruded section) | 
        
            | Weigh | Approx. 550 g (with batteries) | 
        
            | Accessories | Instruction manual x 1 copy, battery (LR06) x 4 pcs |