iOptron RS232 to RJ9 serial cable is used for firmware upgrade (hand controller and/or control boards), mount computer control, or Wi-Fi adapter connection for some mounts. This cable may be needed for the following iOptron mounts:
CEM60/CEM60EC
AZ Mount Pro
iEQ45 Pro and iEQ30 Pro
CEM25/CEM25EC
ZEQ25
SmartEQ/SmartEQ Pro/SmartEQ Pro+
CubePro with 8408 HC
Cube-II
SkyGuider Pro (hand controller firmware upgrade only)
The cable may not be compatible for other brand mounts.
The dovetail groove is designed for ASIAIR PLUS to connect Vixen dovetail plate. It can help achieve more convenient and flexible installation methods compared to the original dovetail plate of ASIAIR PLUS.
I bought this item several months ago and I have to say that I've been quite impressed, It's very easy to use and once set up works fine. It is relatively easy to use as you basically look through the glass window at the night sky and your scope should see what it sees, assuming that you have set it up correctly. Overall a decent finder scope.