The SOLO460 heat detector tester is a battery powered tester that features a universal and easy-to-use design. This detector has a unique IR activation and uses Cross Air Technology for optimum energy use and results. The SOLO460 can be adjusted to make heat detector testing on angled surfaces easy, as well. The SOLO460 can be used on rate of rise and combination detectors for heat levels up to 194°F/ 94°C. This tool also comes with a clear test cup for a crystal-clear view of the LED light on the detector.