YANJEN Battery Operated Stand Alone Carbon Monoxide Detector This item is independent carbon monoxide alarm adopting imported ultra-low power consumption microcontroller and high-performance electrochemical sensor, with advantages of stabilization, reliability, accuracy and long working life. We use British multistep triple-detection alarm mode, it can detect or monitor carbon monoxide concentration changes and send alarm alert when the concentration exceeds alarm threshold, thus to remind you to take effective measures in time to protect lives and safety. Providing optional communication methods, wireless communication method can be customized according to customer's demand. Product Specifications: ModelYJ-812 VoltageDC 3V (2*1.5V AA Batteries) SensorElectrochemical CO sensor Battery Life1 year Standby Current鈮?0uA Alarm Current鈮?5mA Alarm OutputAudiovisual alarm Sound Level85db/10 feet Alarm Level50ppm, alarm within 60-90minutes; 100ppm, alarms within 10-40minutes; 300ppm, alarms within 3 minutes. Dimension桅100(D) x 38(H) mm Product Details: Red top design, long semiconductor gas sensor with LED screen, it displays its concentration of leaking gas. Application: It should be installed at the bedrooms. Delivery: Shipped by sea, economical, long delivery time. Shipped by DHL, TNT, FedEx etc., quick delivery, much more freight costs.China Carbon Monoxide Detector suppliers website:http://www.yanjensecurity.com/carbon-monoxide-detector/