The complete solution for heat detector, smoke detector and carbon monoxide detector testing – no ladders required. This kit includes, Enclosed Delivery Test Kit, Open Delivery Test Kit, plus the HO-VT694 Chemical Heat Detector Tester providing you with the right tool for every job in one convenient equipment kit. The Perfect Service & Maintenance Test Kit to Test Smoke, Heat, and CO Detectors. Designed with Safety in mind: No ladders, No climbing, No reaching.