1.Main be fit for Celestron 80EQ SE SLT PS Series and Meade Infinity and Polaris and so on Series Astronomical Telescope (Note: Meade Infinity Series: 80AZ 90AZ 102AZ and Polaris Series: 80EQ 90EQ not applicable)
2.LED dot is projected onto a non-magnifying viewing window so you can aim the main telescope quickly and easily
3. The weight is only 72g, which is completely unburdened for the telescope