| Power Source | 36 V DC, 30 mA or less (supplied from the Central Unit TS-690) | 
| 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 |