Install the batteries (2 AA batteries) into the mouse. Locate the red laser light underneath the mouse. Next to the light, there is a small button that will require a small object, such as the end of a pen, to press. Press and hold this light for 3 seconds. You should observe several flashes of red light and then a steady red light when it is ready
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Hello Jesse L, you will need an M787c mouse, use an ohmenter , and see if the + battery terminals are connected together, do the same with the minus terminals. The batteries must not be connected in parallel.
Rob
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