Welcome to our store！</br>1、Designed with display screen, it will display the concentration when the device detects a combustible gas leak after power on. 2、If there is a leak, the speaker will sound an alarm, and the indicator will show a red alarm, so you can deal with it in time. 3、There are two power supply methods, one is to install 9V battery (not include) or connect to AC90‑240V power supply. 4、Easy to install, no complicated installation process, with instructions to help you use. 5、Made of high quality ABS fire engineering plastics, practical and durable for you to use. <p class="wang-edit-text"><p class="wang-edit-text">Item Type: Gas&nbsp;Leak&nbsp;Alarm Material: ABS Plug Voltage: 90-240V Power Supply Mode: Plug 90-240V Power Supply, 2PCS 9V Rechargeable Batteries (Battery Not Included) Detection Angle: 360° Scope of Application: Detection of Leakage of Natural Gas, Liquefied Petroleum Gas, Artificial Gas, Etc. Detection Distance: 10㎡ Working Temperature: 0-50℃ Operating Instructions: The device can be powered by plugging in 90-240V voltage power supply or 2pcs 9V rechargeable batteries. After the device is powered on, when the device detects a flammable gas leak, the display will show the concentration, the speaker will sound an alarm, and the indicator will show red. <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Gas&nbsp;Leak&nbsp;Alarm1 x Manual 1 x Screw Mounting Package&nbsp;&nbsp; Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>