Even today you could throw in some new software and maps and you’d be ready to go.The device itself has a smaller screen along with an incredibly loud speaker which can be turned down if needed.If your computer does not have a serial port, you can use an accessory serial to USB connection cable (#18775).Similar adapters are also available through most computer supply retailers.
The cable has a phone-style jack at one end (for connecting to the hand control) and a serial connection (DB9) at the other (for connecting to your PC).
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Note: If you have an AUX port accessory (commonly used with the Advanced GT mount), do not use it to connect for updading firmware.
It is better to directly connect the hand control to the mount and the RS232 cable into the hand control.