Here are some features and specifics about the Extech AN200:

1. Anemometer Functionality: The primary function of the device is to measure air flow (in terms of cubic feet per minute or cubic meters per minute) and air velocity.

2. Infrared Thermometer: It has a built-in non-contact infrared thermometer that can measure temperatures remotely, making it particularly useful for hot spots and other areas where direct contact is not advisable or possible.

3. Vane Sensor: The device typically uses a vane sensor on a telescoping shaft to measure air velocity and airflow.

4. Temperature Measurement: The AN200 can usually measure air temperature in addition to the infrared temperature readings.

5. Display: The instrument typically features a large, easy-to-read display which showcases airflow or air velocity along with simultaneous temperature readings.

6. Versatility: It is suitable for various applications including HVAC installations, repairs, and diagnostics; ensuring ventilation is up to health standards in commercial establishments; or optimizing the performance of heating and cooling systems.

7. Additional Features: The Extech AN200 often has other handy features like the ability to store readings, calculate area and volume, and perform other helpful calculations.