- Loudspeaker designed for use with a standard telephone set, permitting a group of people to overhear both sides of a telephone conversation- Combination volume control and on-off switch is provided on the front panel- Loudspeaker encased in a plastic housing available in color and equipped with a 4-conductor 9 ft cord- External power supply of 18-22 volts AC or DC requiredITT01074400APAK BRAND : ITT
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