8-hour battery

3-in-1 Detector Tester — Wanlin, a Chinese fire detector test equipment manufacturer and exporter based in Shenzhen, China, offers the full A119-YW detector tester line covering aerosol smoke detector test guns, cordless heat detector testers, multi-stimulus smoke + heat testers for multi-sensor detectors, telescopic pole kits in 4.5 m aluminum, 6 m carbon f···