Fiddler,
We have made a lot of units like this in the past for universities and organizations who were doing bird surveys. Depending on the type of birds you are targeting could affect the best unit for your scenario. The speaker is an integral part of these units. We have utilized different speakers in these units to best reproduce the bird sounds that they are targeting. Some might use a cone, while others might need a horn, or a combination. A lot of times, these people do not require a remote control. They use a NX3 or NX4 in these cases, which is a non remote that we have available.
Let me know if I can be of further assistance.
