... by Shenzhen ABS Technology CO.,LTD. It features eleven different wireless protection zones, two wired protection zones, partial disarmed, ... control, etc. compatible with CCTV surveillance and centre monitoring system.1. Wireless type, easy to install, without phone line.2. ... alarm receiving central through GSM network.Specification:1.Protection zone:wire : 2wireless:82. GSM band: EGSM900/DCS 1800/PCS ...