Joblot of 40 Wisualarm Replaceable Battery Stand Alone Smoke Alarm HY-HT10A Powered by a sealed 10-year lithium battery, the WisuAlarm Standalone Heat Detector delivers dependable fire protection without the need for wiring or replacements.Using fixed temperature Class A1 sensing, the detector activates when ambient heat rises between 54°C and 65°C.Once triggered, the built-in 85 dB sounder provides a clear audible alarm until reset. A visual indicator also confirms alarm status.The unit includes a combined test and hush button, low-battery warning signal and the convenience of remote silencing using any infrared TV remote control.
eBay