... Standard Packing BoxDelivery Detail1-3daysSpecifications1. Door Magnetic Sensor 2. Voice activated function 3. Gsm 850/900/1800/1900Mhz 4 ... ensure family life and property. this product compact size, voice clear, long standby time,simple operation, stable performance, without ... + door magnetic sensor1. the world's infinite distance voice transmission ( using the GSM signal transmission, no distance ...