ADT Alarm System Parts. Wireless and Wired capabilities. Base Unit, Control Panel, Siren/Speaker, 15.6 Volt Operating Transformer, 12 Volt Dry Cell Backup Battery, Connection Cables, 17 Wireless Entry Sensors [1 Pictured], 4 Motion Sensors [1 Pictured], 1 Smoke Detector, Wireless Remote, Mounting Screws, Sensor Batteries [Not Pictured], User Guide, Technical Programming Manual. Can be programmed to call monitoring company, police, cell phone, etc. $100.00 or best offer.