If you want better range and are willing to pay a bit more, check out somthing like http://www.merlin-systems.com/falconry/receivers.html http://www.merlin-syst

If you want better range and are willing to pay a bit more, check out somthing like http://www.merlin-systems.com/falconry/receivers.html http://www.merlin-systems.com/falconry/receivers.html They also offer a variety of transmitters of different sizes and types, some of which are pretty small for small birds- in case you have a small dog or cat and want a smaller transmitter.