First Alert HD6135FB Heat Alarm with Battery Backup, 120 V, Thermistor Sensor, 50 ft Detection, Alarm: Audible, 85 dB
Retail Price: $41.26
Honeywell RWD21 Water Leak Alarm, 1/16 in Detection
Retail Price: $12.56
Mighty Mule FM231 Driveway Vehicle Alert System, Black
Retail Price: $109.85
Zircon 64003 Water Leak Detector, 9 V, 72 hr Response, Alarm: Audible, 85 dB
Retail Price: $19.87