Features:1) Eight wireless guard zones and one hard wired guard zone2) DC9V - 12V power supply, standby current less than 25mA3) Six groups of alarm telephone numbers can be pre-stored4) 10 seconds pre-recorded memo messages5) Remote distance operation in via public telephone network set guard status or withdraw guard to the main dialer6) Remote distance listen in the field sound7) Guard setting time delay option: 0 - 90 seconds selection8) Alarm setting time delay option: 0 - 90 seconds selectable by user9) Telephone line cut off alarm function option10) Four wireless distinguishable guard zones on the main set11) Siren time length control option: 1 - 20 minutes selectable by user12) Each of four guard zones can be set on guard or withdraw guard independently13) One panic key for help is provided on the main set14) One panic key for help is provided on the remote controller which will make the main dialer give out loud sound as well as dialing when trigged15) Eight wireless guard zones and one hard wired guard zone16) One silent panic key for help is provided on the remote controller17) Convenient key input is prepared on the front panel18) 120dB siren speaker enclosed producing area:China payment:T/T, L/C supplying capacity:100,000pcs/month