Here are some key features and specifications of the Fluke 289:

1. True RMS Measurements: Ensures accurate readings even with non-linear signals.

2. High-Resolution Display: The Fluke 289 comes with a large 50,000-count, 1/4 VGA dot matrix display with a white backlight, which makes viewing data easier.

3. Logging Functionality: With its built-in data logger, the Fluke 289 can store up to 10,000 readings. This is especially useful for capturing intermittent faults or for monitoring systems over time.

4. TrendCapture: A graphical display feature that helps technicians spot patterns and anomalies in logged data more quickly.

5. Measurement Capabilities: Measures voltage, current (both AC and DC), resistance, capacitance, frequency, and temperature. It also has more advanced functions like measuring duty cycle and pulse width.

6. Low Pass Filter: Useful for accurate voltage and frequency measurements on drives with variable frequency (VFDs).

7. Safety Ratings: Adheres to important safety standards for electrical measurement devices.

8. Battery Life: Extended battery life (up to 200 hours in logging mode) due to its efficient power management system.

9. Connectivity: The Fluke 289 can interface with the Fluke Connect mobile app and other Fluke modules via infrared, allowing for remote viewing and data sharing.

10. LoZ (Low Impedance) Mode: Helps prevent false readings caused by ghost voltages.

11. Min/Max/Average Recording: Captures variations automatically.

The Fluke 289 is an advanced tool designed for professionals who require detailed logging capabilities and in-depth analysis of data.