*供电:2xAAA 电池(不包含)                                                             
*主机和智能手机同时提示门铃音                                                          
*1颗红色工作指示灯                                                           
*传输频率:433Mhz                                                            
*尺寸:5x8x2cm                                                                        
*彩盒包装