Wireless LED Digital Display Carbon Monoxide Gas Densor CO Detector Alarm Tester

Features 1 Electrochemical sensing technology high sensitivity and high detection 2 Digital display of the concentration of toxic gases acoustical optic alarm alarm 3 Using chip control technology saving and durable 4 Small size exquisite industrial design Specification Working voltage 1 5V x 3 4 5V 3 AAA batteries not included Static current 20uAWorking humidity relative humidity 15 90 Digital tube display without voice sound and light alarm concentration value 100PPM 199PPM 50PPM Digital tube display and continuous voice sound and light alarm concentration values 200PPM and above 50PPM Wireless transmission frequency 315MHZ 433MHzWireless transmission distance 300 meters open Package included 1 x CO Detector1 x English User ManualA package of screwsDetails Pictures