Our power amplified sound phones come standard on all control systems but also work great as a stand alone product to replace old hard to hear sound powered phones. Each phone system is powered with 24v and a power supply can be supplied to run from a standard 120v outlet. All handsets are durable and weather resistant and come with armored cords .  Phone systems are pictured with two handsets but can accept as many as needed.  Phones can be wired with existing  comline or any two conductor wire.  Please contact us for your needs