The RM-200SA is a remote microphone designed for the Matrix System. It is equipped with 13 function switches that can be used to select individual zones or zone groups a covered switch and corresponding indicators. The optional RM-210 Remote Microphone Extension permits switches and indications to be expanded in 10-piece units. Specification * 0 dB = 1 V Power Source 24 V DC (operating range: 15 - 40 V DC, supplied from the audio input unit) or DC input power supple connector (when the optional AD-246 power supply unit used). Usable DC power supply plug: 5.5 mm (0.22") outer diameter, 2.1 mm (0.08") inner diameter, 9.5 mm (0.37") long, and non-polarity type. Current Consumption 240 mA or less Audio Output 0 dB*, 600 , balanced External Microphone Input -40 dB*, 2.2 k, unbalanced, mini jack, for electret condenser microphone (phantom power supply: 3 V DC) Distortion 1 % or less Frequency Response 100 Hz - 20 kHz S/N Ratio 60 dB or more Microphone Unidirectional electret condenser microphone with AGC (ON/OFF selectable) Chime Built inside (PCM sound source), monitoring possible using built-in speaker Level Control Microphone sensitivity control, Monitor speaker volume control, Chime (adjustable using the software) Connection Cable Main line: Shielded CPEV cable (1 pair of audio wire + 1 pair of data wire + 1 pair of monitor/control wire + 1 pair of supply wire) or Shielded Category 5 twisted pair cable (CAT5-STP) Branch line: Shielded Category 5 twisted pair cable (CAT5-STP), RJ45 connector Maximum Cable Distance 800 m (874.89 yd) No. of Connectable Expansion Max. 4 units Monitor Speaker Built inside Operation Function switch, Covered switch, Broadcast switch Indicator Power indicator, Failure indicator, Function switch indicator, Covered switch indicator, Broadcast switch indicator Operating Temperature 0 to +40 (32 F to 104 F) Operating Humidity 35 % to 80 % RH (no condensation) Finish ABS resin, blueish gray Dimensions 190 (W) × 76.5 (H) × 215 (D) mm (7.48" × 3.01" × 8.46") (excluding microphone) Weight 880 g (1.94 lb) Option Remote microphone extension: RM-210 Wall mounting bracket: WB-RM200 Electret condenser microphone: WH-4000A, YP-M101, YP-M301 etc.