Welcome to our store！</br>1、Using microprocessor intelligent control, built-in voice chip, operation live voice prompts. 2、Backlight digital display alarm concentration, alarm work can be between AC90-240V. 3、With backup battery function, 9V Ni-MH rechargeable battery can be used. 4、High reliability dual sensor design, efficient and stable inductive transmission. 5、Sensor failure self-test function. <strong><span style="font-family:Arial;font-size:16px;">Description:</span></strong> <span style="font-family:Arial;font-size:16px;">This product is a smart voice CO and flammable gas composite detector, using catalytic combustion sensors and advanced electrochemical CO sensors, with high stability and small sensitivity drift.</span> <strong><span style="font-family:Arial;font-size:16px;">Features:</span></strong> <ul> <li> <span style="font-family:Arial;font-size:16px;">Using microprocessor intelligent control, built-in voice chip, operation live voice prompts.</span> </li> <li> <span style="font-family:Arial;font-size:16px;">Backlight digital display alarm concentration, alarm work can be between AC90-240V.</span> </li> <li> <span style="font-family:Arial;font-size:16px;">With backup battery function, 9V Ni-MH rechargeable battery can be used.</span> </li> <li> <span style="font-family:Arial;font-size:16px;">High reliability dual sensor design, efficient and stable inductive transmission.</span> </li> <li> <span style="font-family:Arial;font-size:16px;">Sensor failure self-test function.</span> </li> <li> <span style="font-family:Arial;font-size:16px;">Alarm memory function, you can view the alarm record at any time.</span> </li> <li> <span style="font-family:Arial;font-size:16px;">The alarm sounds on the spot when the alarm is sounded.</span> </li> </ul> <strong><span style="font-family:Arial;font-size:16px;">Specifications:</span></strong> <span style="color:#E53333;font-family:Arial;font-size:16px;">Plug: US, EU, UK, AU.(Optional)</span> <span style="font-family:Arial;font-size:16px;">External power supply: AC 90V-240V50-60Hz Built-in battery: 9V Ni-MH rechargeable battery Working temperature: 0-50°C Operating Humidity: Relative humidity 10%-95% Display concentration: - Carbon monoxide: 100PPM999PPM (+50PPM) - Combustible gas: 0.25% 2% LEL (2500PPM-20000PPM±1500ppm) Indicator information: - AC power: Green LED light - Alarm: Red LED flashes - Sensor failure: Yellow LED lights up Alarm sound: Live voice prompts and ringing siren </span> <span style="font-family:Arial;font-size:16px;">Size: Approx. 11.3 * 7.5 * 4.5cm / 4.4 * 2.9 * 1.7in</span> <span style="font-family:Arial;font-size:16px;">Weight: 60g</span> <strong><span style="font-family:Arial;font-size:16px;">Packing List:</span></strong> <span style="font-family:Arial;font-size:16px;">1 * Alarm</span> <span style="font-family:Arial;font-size:16px;">1 * User Manual</span> 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>