LM 201A carbon monoxide detector certified and tested according to EN 50291. Display with display of temperature, CO concentration, battery charge level, operation monitoring and alarm, as well as three colored LED indicator lights indicating the status of the CO detector. LED indicator with self-test function, TEST button for gas detector test function, error warning in case of malfunction, warning signal in case of low battery. Early warning system for early warning at different CO concentrations - CO alarm at dangerous concentration of CO. Mute sound in case of false alarm for 5 minutes. Scope of delivery: 1 x CO detector type LM 201A, 3 x 1.5V DC batteries type AA. Effective Detection Gas: Carbon Monoxide Detection Method: Electrochemical Sensor Operating Voltage: 4.5V DC Working Environment: Temperature 0 to 45 Relative humidity: 0-90% RH Quiescent operating current: 8010uA Alarm current: 45 ~75mA Alarm sound level: >85dB (1m distance) Power indicator: flashes once every 45 seconds < p>Fault detection: detection every 2 minutes Applicable occasions: family, hotel single room, warehouse, basement