Feature: 1. Equipped with 2.8 inch LCD high-definition color screen display, can display gas concentration, temperature, humidity numerical values and curve graph interface. 2. Gas exceeds the standard alarm peak buzzer sound, digital change colour, you can set the alarm value of the gas by yourself. 3. Data saving function (can store 100000 pieces of data), set the timer to store, delete data, view historical data. 4. Display brightness adjustment 5%-100%, default 60% brightness at power on, temperature can be switched between Celsius degree ℃ and Fahrenheit degree ℉. 5. Can measure gas, temperature and humidity. It is widely used in poultry farms, pig farms, horse stables, animal welfare shelters, cold storage machine rooms, laboratories, pharmaceutical workshop. Specification: Specifications: Model: A8-NH3 Material: ABS Detection of Gas: NH3 Power Supply: 5V/1A Ammonia Measurement Range: 0-100 PPM Temperature Measurement Range: -9℃~55℃ Humidity Measurement Range: 0%RH~100%RH Day/Time: A replaceable plug-in electrochemical sensor is adopted Built in Battery Capacity: 2500mAh Main Engine Weight Only: 200g Work Environment: -9℃~55℃,