Power Source	230 V AC, 50/60 Hz
Power Consumption	Max. 60 W
Rated Output	35 V DC, 650 mA × 2
Input	MIC: -60 dB*, 600 Ω, unbalanced, phone jack AUX: -20 dB*, 10 kΩ, unbalanced, phone jack
Output	Recording: -20 dB*, 10 kΩ, unbalanced, phone jack, pin jack × 2
Equalizer Insertion Input Terminal	Input: -20 dB*, 10 kΩ, pin jack Output: -20 dB*, 10 kΩ, pin jack
Expansion Input and Output Terminal	Input: -20 dB*, 10 kΩ, pin jack × 2 Output: -20 dB*, 10 kΩ, pin jack × 2 Control: 10 kΩ or more, voltage output, pin jack × 2
Control	Priority speech chime: Operation of TS-771's priority button activates a single-tone chime Speaker restriction: Number of simultaneously-usable TS-772s and TS-775s can be set to 1, 3, or 6 Automatic Mic-off: Function OFF/20 s/40 s (selectable)
Number of Connectable Conference Units	70 (Max. 35 units per line), Max 210 (when 3 expansion amplifiers)
Operating Temperature	0℃ to +40℃ (32゜F to 104゜F)
Operating Humidity	Under 90% RH (no condensation)
Finish	Panel: Aluminum, hairline, black Case: Pre-coated steel plate, black, 30% gloss
Dimensions	210 (W) × 107.1 (H) × 316 (D) mm (8.27'' × 4.22'' × 12.44'')
Weight	4 kg (8.82 lb)
Accessory	Power cord (2 m (6.56 ft)) …1
Option	Extension cord: YR-770-2M, YR-770-10M