USB wired BIGtrack 2 has two switch ports located on the left and right side of the device. For switch use, plug a switch into each switch jack. Each switch will perform the same function as clicking the left or right button on the device.
Oversized "Trackball" computer mouse by Ablenet. I have two BIGtrack2 mice available. One is new and one is gently used. This item sells for $100 new. I am asking $40 for the gently used BIGtrack2. I'm now unable to operate due to disability; If you have something computer tech/adaptive related, I'm open to trade/exchanges of equal or greater value! ** USED ** $40