FM - Dogfence / Catfence 

This is the signal type used by Dogfence (same company as Catfence)

This company can provide the equipment for doing absolutely massive installations (6km apparently) - although generally frowned upon as your pet could be miles away. If you want one, this is the brand that can supply the kit for such a job.

In my opinion, not suitable for most cats as the receiver collar is quite 'tall'. Lifting up the chin on smaller pets.

Cost effective solution for robotic mowers, Just a shame about the shape of the receiver with very small dogs or cats. 

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