Special Features:

Dimensions: (h x l x d) 9.9" x 6.5" x 3.9", output impedance: 80 ohms at 8 volts, input impedance: 220-10, 000 ohms, shipping weight: 11 lbs

Properties:

An item which may provide two-way amplified voice communications when connected to one or more like stations directly or via intermediate control equipment; includes loudspeaker (which may be used as a loudspeaker or microphone), signalling devices, amplifier and station selector switches. May include separate microphone, earphone, handset or headset. See also, telephone connecting station.