====== Signalizer Loudspeaker System Model S20 ====== {{s20_30.jpg?150|}} ===== Description ===== *Audio and speaker system for use with receivers and transceivers. *Plugs into headphone jack. *Provides maximum AGC to keep all signals at a constant pre-set level. *Can be switched in and out of the circuit. *Can be used with internal speaker for headphones. *115 VAC operation. *4.5" x 8.25" x 6.5" *Wt. 3.5 lbs.