产品参数：心达XD-103主机                                                   

1.工作电压：12Ｖ                                           

2.工作电流：《１Ａ                                              

3.呼叫器容量：128个呼叫器                                     

4.支持房间号：001~999                                    

5.工作温度：－200C －550C                                 

6.接收灵敏度：－105dBm                                       

7.接收距离：500米（空旷地）                                   

8.接收频率：433ＭＨZ/315MHZ                                      

9.尺寸：38cm*16cm*3.5cm                                         

10..重量：2.5kg