Professional alarm kit Ajax grade 2 black ethernet and gprs

What are Grades and why is it so important for a security system to have them

AJAX ALARM SYSTEM KIT4 ΑΣΥΡΜΑΤΟ ΣΥΣΤΗΜΑ ΣΥΝΑΓΕΡΜΟΥ - Digitalnet Συστήματα ασφαλείας

Ajax AJ-HUBKIT-RENOVE1-W - Professional Alarm Kit, Certificate Grade

38173.58.BL1 - Wireless Ajax Alarm Kit GPRS / LAN / 2SIM 2G Black

Ajax Wireless Burglar Alarm Kit HUB + MOTION + DOOR + SPACE AJ-HBBKIT-B

AJAX Hub 2 Alarmanlagen Set GSM LAN PIR Kamera (Hub 2, MotionCam, DoorProtect, SpaceControl)

Ajax alarm

Ajax security system review

Ajax kit 1 Hub2(2G)+MP DD - House with keyfobs (Hub 2 (2G), MotionProtect 2 pcs, DoorProtect, SpaceControl 2 pcs, StreetSiren DoubleDeck, HomeSiren) (35651W)

Ajax StarterKit Plus Black Home Alarm - Kit 11 : : Tools & Home Improvement

Ajax Hub Plus — Intelligent security control panel

AJAX AJ-HUB-W AJHUB Wireless Jeweller 868MHz control panel with GPRS/LAN connectivity white color

AJ-HUB2-DC6V-W - Ajax professional alarm control unit - Grade 2 certified - Wireless Jeweler 868Mhz