DA-712Automatically dials for help via telephone line when alarm system is activated Programmable security code

Stores up to four telephone numbers Records voice message up to 20 seconds Deactivated by entering security code.
Can be connected with any kind of alarm system. accept NC./NO./Voltage trigger singals (NCand NO must be a dry contact relay ) .
* Can store 4 sets of telephone number . with 4 digits secret code. each set of telephone unmber has 16 digitd capacity max.
* Built-in voice IC. to record your voice message in 16 seconds .
* Has a 7 segments LED display .4 LEDindicatores and echo sound to make your operation easier .
* Has check function to prove you input correct or Not .
* When the line is connected after dial. someone answer the phone . it will broadcast the voice message two times .
* If there is nobody answer the phone about 30 seconds.it will dial next set of telephone number.if the line is busy it will quit and dial next set of telephone number automatically to save waiting times. when all set of telephone number had connected.it will stop to call until next trigger signal is accepted.