Apple Pro Mouse Clear/Black model M5769 USB spares and repairs?

Used with our computer for some while before we upgraded. Testing it on our 2017 iMac it seemed to work intermittently – red light flickered within. Not sure if this is a software issue or a loose connection – don’t remember keeping it knowing it was faulty!

Item will be posted wrapped in bubble wrap inside a cardboard box. as a small parcel. 202 g. and will be posted either Royal Mail 2^nd class for £3.69 or Royal Mail First class for £4.39

Item 311