Combination Smoke and Carbon Monoxide Detector Alarm, Beeps Warning Smoke Co Alarm Clock for Travel Home Bedroom Living Room Basement Attics, Battery Operated, Comply with UL 217 and UL 2034, 1 Pack

✅Test this alarm First, HOW TO TEST IT(3 steps): 1. Install the batteries in clean air, then press the test button for five seconds to test the unit electronics, beeps will sound if it’s normal; 2. Leave it in clean air for one minute; 3. put it into a sealed bag, spray some smoke or CO gas into the bag and seal it. Waiting for about one minute, the Alarm will go off if it’s normal. NOTE: DO NOT test it by directly burning something under this alarm, which is an invalid test.
✅Keep your family safe with this battery operated smoke and carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO and smoke levels, even if there’s a power failure. Features an electrochemical sensing technology and a photoelectric sensor that detects the larger particles of a smoldering fire. Please thoroughly read PRODUCT DESCRIPTION and the user manual before using.
✅Indicator lights on the face of the unit display the presence of smoke and carbon monoxide, while an 85dB beeps siren provides a clear, loud warning upon detection
✅ 2 * AA Battery-operated unit installs quickly and easily without an electrician, Can connect to other compatible detectors, To ensure all alarms will sound when threat is detected(Battery not included)
✅Dimensions: 4 * 4 * 1.5 inch. Simple to use, NOTE: When installation please follow the circular arrow direction that Marked on the product for rotating the Mounting base/Bracket: PRESS DOWN AND TWIST; 【Do not install it in or near kitchens/garages/furnace room/bathrooms】. A single button tests the unit or silences the alarm. Low battery signal mute, quiets low battery signal for up to 8 hours. if there is any problems, please feel free to contact us, we are always here to help you.