The polar finder is simply screwed into the back of the mount. Correct alignment of the mount can be achieved within a very short time with this improved polar finder. Good alignment of the mount with the North Celestial Pole can be achieved in a short time by using the polar finder. As the celestial North Pole (to which the telescope mount must be aligned) does not exactly coincide with the position of the Pole Star, using this polar finder is very important. There are two models here which have the same functions you may receive one of them. The new model is easier to use than the old one with Big Dipper and a target-spot.As we know, Polaris position changes as time passes, the improved product solve this problem when doing polar alignment in Northern hemisphere, it allows you put Polaris on the the correct circle corresponding to the present year for better alignment precision. Here are a few APPs that can give Polaris orientation in the FOV of a polar scope depending on the observer’s position and local time. Generally, the orientations are given in time format. The new reticle has a clock like engraving which is compatible with these applications. For polar alignment, rotate the R.A. axis of the mount to put the 0 o’clock of the reticle at the highest position in the FOV of the polar scope, then place the Polaris at the corrent clock position given by the SynScan hand control or other applications.Polaris position also changes as time passes. The new reticle displays 3 circles to represent Polaris’s orbit in year 2012, 2020 and 2028. It also gives sub-dials at 0, 3, 6, and 9 o’clock position for year 2016, 2024 and 2032. An engraving labeled with the above years is also displayed on the right of the FOV for memo purpose. Android and apple apps: Polar Scope Align Mobile application: Polar Align Ver 4.0, Polar Scope Align Pro (for iOS) or Polar Finder (for Android)