I bought this product sometime ago as a spare (i have had good service from your Trackballs). When I went to install it, I can't work out where to insert the battery, or rather how to open the battery comparment in the trackball. I do not undertand teh arrows on the bottom. A diagram/video clip would help
The setup document does not help
Is there a fuller set-up docuemnt / manual
Does the device work with windows 7 (as I say, it's been in my cupboard for a while)
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