1  With high strength aluminum alloy shell,durable in use

2  Use digital code technology and the function is steady and reliable

3  Show 3-digit number and also can show ABCDHLPU,easy to distinguish the service area.from 001-999,A01-U99.

4  It can work with 200pcs 1-key or multi-kesy call buttons in max

5  It can show differetn service type.fixed, slow flash, flash

6  It can  save 10 calling info in turn,and apply in basic service places.

7 Calling Alert: sounds or music

Technical parameters:

Working voltage:DC12V~18V
Working current:<20mA
Working Frequency:315MHz±75k 
Dimension:225*165*40mm