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Main Board / Metal box (transformer and main board inside) Keypad (LED display) User Manual Phone Line Terminal Resistance Optional Accessories: Wireless PIR Motion Detector, Wireless Door sensor, Wireless Emergency Button, Wired PIR Motion Detector, Wired Smoke Detector, Wired Gas Leakage Detector, Wired Photoelectric Beam Sensors, Wired Door Sensor,Wired External Siren, Sound monitor etc. | |