Wireless PIR alarm with autodial function(PSTN),Once PIR detect any motion ,the alarm will siren and autodial the prset Tel. No. ,total can set 3 sets Tel. No.. Key Specifications/Special Features: Pre-store 3 sets of normal use telephone number, max 16 digits /////Record voice message such as \\"address xx, intruder in house”, max 6 seconds /////Alarm and auto dial function will be triggered when PIR detect motion Play record voice message when phone put through/////Easy to arm and disarm with program 4-digit security code /////Can set silent mode for phone dialing only when intruder is detected///// Infrared detect coverage 23 feet, 140 degree horizontal and 90 degree vertical /////30 seconds exit delay and 10 seconds entry delay /////Siren sound: 130dB /////Power operation: 4 x AAA size alkaline batteries (not included) Low battery power indicator /////Dimension (W x H x D): 7 x 163 x 38mm /////Ideal for stores, office, library, wear house, home guard and so on