I recently bought two of these, one for a friend. Played with him and another guy the other day. We all had different sky caddies: 2.5s, 4s and 5s. They were all consistent with each other, they were extremely accurate and brilliantly mapped. The only difficulty with the SG4 is why they have such a terrible connection cable. Be careful not to overtighten the small set screw. What was wrong with the standard USB connector on 2.5 and 5. Just a little advice. If you turn the connection cable upside down, you can charge your device via the USB port. Found this by accident. In general, a great thing, a terrible port. The new software and Skygolf features make this older system a great value with all the modern bells and whistles.
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