Dahua Wireless Door Detector, Signal strength detection, Low battery alarm, Temperature measurement, 3Yr Warranty

Dahua Wirless Door Detector Plus, Displays the Temperature of the Surrounding Environment and Supports the overheating alarm, Jamming Detection & Communication Encryption, Tilt & Shock Detection, 3Yr Warranty

Dahua Wireless Input Expander, Six Types of Alarm: Intrusion, Medical, Fire, Emergency, Gas, and Tamper, NC and NO for alarm inputs (NO by default), Signal Strength Detection, Low Battery Alarm, Temperature monitoring, 3Yr Warranty.