QHY PoleMaster - a high precision, easy to use electric polar scope When you purchase this product, you must tell us the type of your equatorial instrument and we can give you the applicable interface, otherwise the product will not be able to receive your equatorial instrument and cannot be used. Interface types areEQ6/AZEQ6HEQ5CEM25/ZEQ25CEM60iEQ30/iEQ45AVXAZEQ5 CGEMMESUSXPUNC It takes only two minutes to get a very accurate alignment of the polar axis with an accuracy of up to 30 seconds PoleMaster has several significant advantages Fast, easy, comfortable High precision Wide field of view Real-time pole tracking/calibration Without the samsung calibration