Combustible Gas & Carbon Monoxide Detector 4-in-1 Alarm with Temp/Humidity Sensor ? Plug-in CO/Gas Leak Detector for Home, RV, Apartment Safety (Explosive Gas & CO Detection) (Battery, 2-Pack) Digital Devices 10 Accessories and a top round hole

and a top round hole diameter of 1

There are fixed straps on both sides to help you fix the hanger cover and prevent it from running around or falling off

and "peepers" to keep them clean and dry

electric wire

supports 16 electrical devices simultaneously

Combustible Gas & Carbon Monoxide Detector 4-in-1 Alarm with Temp/Humidity Sensor ? Plug-in CO/Gas Leak Detector for Home, RV, Apartment Safety (Explosive Gas & CO Detection) (Battery, 2-Pack) Digital Devices 10 Accessories and a top round holeAbout this item ???????? ???? ??????: Plug and play, savinglation time. Just plug it into a standard power outlet at home to start,carbon monoxide alarm accurately detects and instantly reacts to CO and combustible gas levels in the air, keep your family safe. ? See more product details