Introducing iOptron iPolarTM - a high precision, easy to use electronics polarscope (e-PS). What makes iPolar unique? 1.Can be easily installed inside the RA shaft on all iOptron equatorial mounts. 2.Can be used on any mounts with adapters either internally or externally. 3.USB plug and play (no driver needed) 4.Works globally, no need to set northern and southern hemisphere. 5.No visible Polaris (north) or Sigma Octantis (south) necessary. 6.No need to rotate the mount during polar align. iPolar is a smart electronic polarscope for everyone. Currently Supported Mounts: CEM120/CEM120EC/CEM120EC2 CEM60/CEM60EC CEM40/CEM40EC CEM25/CEM25EC/ZEQ25 iEQ45Pro/iEQ45 iEQ30Pro/iEQ30 SkyGuider Pro SkyGuider SkyTracker Pro SkyTracker AVX CGEM HEQ5 TAK