1. It adopts a high precision gravity accelerator as the dip angle measuring sensor. The resolution is 0.01. It can measure the dip angle accurately. 

2. It adopts a 3D magneto-resistance sensor to detect the signal in Earth's magnetic field. It forms a mathematical model to calculate the azimuth angel. 

3. It uses modern digital signal processing techniques, so it can calculate dip angle and azimuth angle accurately, so that they can meet the requirement for accuracy.

4. It adopts new type A/D converting SCM to collect the probe data. It achieves a high precision data collection.

5. It adopts long distance transmitting technology, so it can transmit digital signal through long cable reliably. This highly improves anti-interference ability of the instrument.

6. It removes hammer swing parts in the probe tube. This highly improves anti-shaking ability of the instrument. The depth interval and measurement point numbers can be preset at random. This improves measurement efficiency.

7. It adopts an ultra-brighten LCD for display, so it is convenient for use in the field.