Simulates smoke to provide a true, functional test for smoke detectors. Aerosol spray extends user reach up to 6", allows testing to be done while standing safely on the floor. Convenient package makes testing easy, increasing the likelihood that detectors will be tested on a regular basis. No harmful residue, plastic safe, non-staining. Contains no Class I Ozone Depleting Chemicals.SEPTLS12502105. TLS12502105. Crc Crc Smoke Test Brand Smoke Detector Testers - 02105.