1、Multifunctional: The meter tests temperature and humidity for NH3 with 0 to 50ppm detection range. It also supports switching between Celsius and Fahrenheit temperature units. 2、History Record and Rechargeable Battery: This gas test meter saves historical data and comes with a 2000mAh rechargeable lithium battery, including a USB charging cable. 3、Clear LCD Display: Features a 3.5 inch LCD screen for easy reading and monitoring of NH3 temperature, and humidity. 4、Durable Construction: This gas test meter is made from high grade ABS material, ensuring robustness and long service life. 5、Easy to Operate: The meter is simple and convenient to operate, providing peace of mind for users. Item Type: Handheld NH3 Meter Material: ABS NH3 Sensor Technology: Electrochemical sensor History keeping, 3.5 inch LCD display. Power Supply: Rechargeable lithium battery 2000mah (shipped with built in battery) Detection Range: NH3 (0 to 50ppm) Celsius C and Fahrenheit F temperature units can be switched. Advantage : Integrated NH3/Temperature/Humidity detection Built in auto calibration algorithm to enhance sensitivity and save cost Exceeded the standard alarm, automatic detection, automatic measurement If people don't like the alarm sound, they can turn it off by pressing the power button twice. User friendly and easy to operate 1 x NH3 Test Meter 1 x English Instruction Manual 1 x Charging Cable