Power Source

• 36 V DC, 30 mA or less (supplied from the Central Unit TS-690-AS)

Output

• Headphone/Recording: Ø 3.5 mm, mini jack (3P: monaural) 
  Internal speaker: 130 Ω, 200 mW

Control

• Speech: Microphone, speaker on-off control by speech button
  Priority: Microphone, speaker on-off, other microphone cut-off, and
  single-tone chime activation by priority button
  Volume control: Headphone/Recording and internal speaker volume adjustable

Microphone Unit
(Accessory)

• Electret Condenser Microphone
• Directivity: Unidirectional
• Impedance: 1.8kΩ
• Sensitivity:  -37dB (1kHz 0dB = 1V/Pa)
• Frequency Response: 100Hz - 13 kHz
• Length: 518mm
• Weight: 105g (0.23 lb)

Operating Temperature

• 0 °C to +40 °C (32 °F to 104 °F)

Operating Humidity

• 90 %RH or less (no condensation)

Finish

• Upper case: ABS resin, metallic grey, paint
• Lower case: ABS resin, black

Dimensions

• 145.3 (W) × 70.7 (H) × 150.5 (D) mm (5.72" × 2.78" × 5.93")
  (Excluding Microphone Unit)

Weight

• 800 g (1.76 lb) (Excluding Microphone Unit)

Accessory

• Long Microphone Unit x 1

Option

• Extension cord: YR-790-3, YR-790-10