ST-979T sending terminal is composed of number keyboard and signal-sending screen.

ST-979R receiving terminal is a LED display (receiving screen) in general that can display three numbers. Users can add in two sets of LED indicator lights used to remind calling on both sides of display.

Apply high brightness red LED digital screen. Standard display screen can display three digits at most, the maximum is "999".

Apply the standard keyboard of PS2 interface, and other keyboards that are identical interface with PS2 are acceptable.

Internal MP3 speech, single channel output.
Sound is clear, supports any languages in the world, and can be upgraded infinitely through connecting with computer.
Real people speech and speech sources can be revised at any time.

96 steps volume adjustments.
Can use speaker and internal buzzer as speech reminding device.
Connecting in series LED display screens can compose many kinds of systems calling numbers synchronously.

Adopting IP address division can connect two hundred pieces of ST-979R receiving screens at the same time.
Adopting the aluminum alloy square outer covering of the bar-like integration or combination composes signal-receiving screen. Black cover, external form is beautiful.

Apply 315MHz high frequency wireless communication and can realize 100 meters unobstructed communication.
Can choose FM RDS wireless transmission mode, and can transmit audio at the same time and support sending-terminal with mike real-time calling number function.
Can choose various LED screens such as green, yellow, and blue, white.
Adopt +24V power supply.

Volume is small; Weight is light; Operation is very simple; Installation is easy; The important thing is that it is practical and cheap.