Compact body, portable,Small design, easy to carry. Real-time detection, intelligent cycle alarm with beeping sound,Prevent danger from happening. High-precision electrochemical CO sensor for more accurate detection,Built-in electrochemical carbon monoxide detection high-performance chip to obtain accurate data. TFT high-definition color screen display, the value is clear at a glance,High-definition large screen, more intuitive and convenient to read, can also view time and date, can export data, clear and easy to read. Double-sided porous air duct design for sensitive and accurate detection,Multi-hole double-sided design, real-time circulation convection monitoring is more accurate. Product name:CO concentration detector Detection range:0-999ppm Working voltage:5V Warm-up time:No preheating required Data refresh frequency:1s Working humidity:0-95%RH Working temperature:-20-60°C Charging method:Type-C interface Colour:As Shown Material:ABS Package Contents: 1 * CO Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.