The mains adaptor kit for Foxwatch, Catwatch or Pestfree and Catfree comes with a 10 metre (32 feet) lead. The mains power adaptor also has the benefit of increasing the output of the device it is supplying by 30% and of course ensures continual supply to the device with non of the decline in power associated with batteries.
You can also extend the mains adaptor range by adding a 10 metre extension cable.
The Y connector kit will allow the use of one mains adaptor to run two devices. So you might want to run a Foxwatch close to your boundary hedge and a Catwatch near the bird feeding station, use the extension cable and connector kit to do this.