Feature:1. Carbon monoxide gas meter are widely used in science and industry to detect the concentration of carbon monoxide gas.2. Professional and accurate measurement, can continuously monitor the CO gas concentration in the surrounding environment.3. Sound alarm works when CO gas concentration reaches the level of the alarm.4. High portable CO gas tester with compact size and light weight is easy to carry and operate.5. Large LCD color display and ℃/℉ switch. Can set concentration of alarm value.Specification:Condition: 100% Brand NewItem Type: Carbon Monoxide MeterMaterial: ABSColor: As shown in the pictureWeight: Approx.147g/5.2ozSensor Type: Stable electrochemical gas ratio (CO)Detection Gas: Carbon monoxide (CO)Temperature measurement: ambient temperatureDisplay Unit: CO: ppm, temperature: °C/℉Measuring Range: CO: 0~1000PPM, temperature: 0~50℃/ 32~122℉Resolution: CO: 1PPM, temperature: 0.1℃/ 0.1℉Accuracy: CO: ±5% or ±10PPM, temperature: ±1.5℃Response Time: <60sAlarm: Sound and light alarmAlarm Point: 24PPM preset (adjustable)Battery Type: 3 x AAA 1.5V alkaline batteries (Not included)Working Temperature: 0~40℃, relative humidity 1%~99%Storage Temperature: -30~60℃, relative humidity: 1%~99%.Package List:1 x Carbon Monoxide Meter1 x Instruction ManualNote:1. Please allow 1‑2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.