Caller identification (number display) conceals a sophisticated phone line transmitter.

No need of technical or professional knowledge - simply plug it to one of your phone extensions (with a phone cord) and you're set.

The transmitter is high - reliability FM modulated hybrid circuit.

Frequency operation is 433 MHz crystal-controlled FM narrow band No antenna required.

No battery required for the transmitter (Powered by line current).

Extremely difficult to detect - nil current consumption during on hook operation .

Audio bandwidth: 20 Hz to 30 kHz .

Range up to 1500 feet in open area .

Automatically transmits the conversation between both parties on the line to a receiver immediately a conversation begins.

You can use any extension (not only the one that the transmitter is connected to), for full operation.

When your telephone begins to ring, the caller ID displays the telephone number of the party calling you. This requires special local telephone service subscription. The caller ID operates perfectly with no interfering from the phone transmitter.