| Power Source | DC 24V | 
        
            | Current Consumption | Below 85mA | 
        
            | Audio Input | 1V rms (Max: 2V rms), unbalanced 10kΩ | 
        
            | Audio Output | 1V rms, unbalaanced 600Ω | 
        
            | Frequency Response | LINE IN (Sampling Frequency: 22k): 20Hz – 10kHz   LINE OUT (MP3/Smapling Frequency: 44k): 40Hz-15kHz | 
        
            | Control Contact Input | Open circuit voltage: 24V DC; short circuit current: ≤5mA | 
        
            | Relay   Normally Closed Contact (NC) Common Contact (COM) Normally Open Contact (NO) | With stand voltage ≤30V DC, control current ≤500mA   With stand voltage ≤30V DC, control current ≤500mA With stand voltage ≤30V DC, control current ≤500mA | 
        
            | Network I/F | 10 BASE-T/100 BASE-TX, auto negotiation | 
        
            | Network Protocol | TCP/IP, UDP, ARP, HTTP, ICMP, IGMP | 
        
            | Operation Temperature | 0°C to +40°C | 
        
            | Operation Humidity | Less than 90% RH (no condensation) | 
        
            | Dimension (W) x (H) x (D) | 91 x 42 x 106 mm | 
        
            | Installation Method | Desk/Surface mounted master station (When mounting to the wall) | 
        
            | Operating Temperature | 0 ℃ to +40 ℃ (32 ゜F to 104 ゜F) | 
        
            | Accessory | 5P terminal blocks x 1, 4P terminal blocks x1,   Plasticfoot (10mm*3mm) x4 |