There are basic alarm systems that include door sensors, window sensors and a keypad to control arming and disarming. For properties that have more square footage and openings to cover, a smart security system with wireless doorbell cameras, spy cameras, motion sensors, and multiple door and window alarms can all be controlled remotely via your smartphone or tablet, allowing you to keep an eye on things from anywhere, especially when you’re not home. To cover all your bases, be sure to look into driveway alarms, voice recorders, water leak detectors and pool door alarms. Whatever type of system you’re looking to utilize to protect your home, The Home Depot has all of the expert knowledge, popular brands and parts you need to keep things safe and secure. Sale 12 Volt 4AH Alarm BatteryRegular Price:$20. 00 Sale$11. 25 Add to CartAdd to WishlistAdd to Compare Sale 12 Volt 7AH Alarm System BatteryRegular Price:$22. 00 Sale$13. 95 Add to CartAdd to WishlistAdd to Compare Sale Honeywell Slim Line Wireless Door/Window TransmitterRegular Price:$45. 00 Sale$36. 99 Add to CartAdd to WishlistAdd to Compare Sale 3.