Necklaces are to be used like collars, with the main difference that there is no bel...

The system attaches to the tail and a bar can be used as an extension to allow the b...

Available at 1 or MHz within 148-221MHz...

Affordable and simple VHF receiver. It covers 0.48 MHz within 148-222MHz as specifie...

To be attached to existing GPS equipment...

Freshwater fish and other freswhater species can be studied with VHF radio tracking ...