Longer playing times are available on special units. Eight messages per unit are available as long as total time does not exceed 4 minutes. Each message starts with its own push-button. 15 Watt amplifier is included inside each DMF-60 and can power an 8 ohm speaker. Microchips control the playback of the unit which means there are no moving parts and no maintenance.
Message remains even if power is interrupted.
It is also possible to power the unit with a 12 Volt battery. Starting the playback is easily done with any momentary contact to the start terminals, such as a push button. Control relay is standard on the DMF-60, allowing you to control other external power relays. One message up to 4 minutes 15 seconds. Each time the button is pushed, the next message in the cycle plays.