Our air quality monitor can detect CO2 concentration in your living environment. We provides a multifunction wifi air quality tester and a wifi CO2 tester for your choice. Adopting sensitive sensor, it provides quick and accurate data in the TFT digital color screen. Built in with 2600mAh rechargeable battery, it can be widely in home, office, car, classroom, hotel, gym, greenhouse, warehouse, wine cellar and more. Features: Multifuntion: P1 can test the concentration of CO2, PM1.0, PM2.5, PM10, and calculate the number of 0.3m, 0.5m, 1.0m, 2.5m, 5.0m, 10m particles; It can be connected to 2.4GHz wifi, which allows you to remotely monitor anytime anywhere. Carbon Dioxide Tester: Adopts sensitive sensor, with porous air convection, quickly and accurately detects CO2 concentration in the living environment. It can be widely used in home, office, car, classroom, hotel, gym, greenhouse, warehouse, wine cellar, etc. TFT Color Screen: Displays CO2 concentration, 4-color Indicator (green-good, moderate-yellow, orange-unhealthy, red-hazardous), battery level, etc. TFT digital color screen for easy and clear reading even in dark environments. Rechargeable Design: Built-in 2600mAh rechargeable lithium battery for strong endurance. With USB interface, quick to charge via power adapter, power bank, laptop, etc. Concise Appearance: Simple but stylish appearance, desktop or wall mounted installation, fits in well with different styles of houses. Compact and lightweight, easy to carry. High-temperature Protection: The air quality tester will automatically shut down when the temperature exceeds 65 for protection. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Model: P1 APP: Compatible with "Tuya Smart" APP, 2.4GHz Wifi Color: White Material: ABS + Electronic Components Screen: TFT Digital Color Screen Resolution: 240(3RGB)*320 Power Supply: 5V/ 1A CO2 Detection Range: 400-9999PPM CO2 Detection Accuracy: 50PPM/ 5% PM2.5 Detection Range: 0~2500g/m3 Built-in Battery: 2600mAh Lithium Battery Working Environment: -9~55, 90%RH Item Size: 90 * 70 * 35mm / 3.54 * 2.76 * 1.38in Item Weight: 162g / 5.69oz (P1); 139g / 4.90oz (P1-C) Package Size: 11.7 * 11.2 * 7cm / 4.61 * 4.41 * 2.76in Package Weight: 309g / 10.88oz (P1); 284g / 10.02oz (P1-C) Package List: 1 * Air Quality Tester 1 * USB Cable 1 * User Manual