When you receive the new receiver, you must pair the new receiver to your mouse 

Note,  this is Non-Unifying, but a single-channel receiver.

Compatible with Logitech:
M305(with orange star) M235/M310/M310T/M320/M325/M330
M345/T400/M505/M510/M515/M525/M560/M600
T620/M720/M905/MX master/MX Anywhere 2
Other mouse models are not guaranteed to work normally!
Shipping Time

   All items will be shipped within 72  business hours upon receipt of payment (except Saturday and Sunday).
 
It takes about 15-45 days to ship to Australia