With automatic step
-down circuit, you can directly use the 12V power supply of the security alarm system
Adopt anti
-noise circuit design, anti
-noise and anti
-interference
The card slot is newly upgraded, which is convenient for viewing the contact between the card and the chip. It is also beneficial to some customers who use Cat
Standard DTMF input recognition and display. In addition to the standard caller ID, you can also use standard DTMF input to avoid problems such as missing numbers and other missing numbers
LCD display, signal value display, call status display, etc.