Introduction: 



1) Signal enhancer can add the transmitting distance between the button 



    and the host. It receives the signal from the button wirelessly and than  



    enhance the signal to transmit to the host. It is applicable for the HY-2677A 



    system, HY-2677B system, HY-2677C system, HY-2677E system and 



    HY-2677G system. The installation of the signal enhancer is very simple 



    and no signal line is needed 



2) When the site is very large (more than 2,000 square meters usually) or the 



    signal is severely shielded in the building, several signal enhancers can be 



    adopted to realize the no-blind coverage. Furthermore, the signal relaying



    function of the signal enhancer can ensure the clients with large sites to 



    use the MMCall products swimmingly  





System parameters: 



1) Receiving frequency: 315.6MHz



2) Transmitting frequency: 315.6MHz



3) Coverage: 500 meters (in open area)



4) Power supply: 220V



5) Antenna mode of the button: stick antenna



6) Receiving sensitivity: -120dB



7) Responding speed: <1s



8) Coding mode: FM