Got this on a recent trip that I just arrived back from. I'm not sure if I dare unwrap it all the way. it's an arc 5 t19 transmitter. The top of the antifungal moisture wrap was opened to determine the model number There is an inspection tag inside that says the unit would be 'overage in 56'. http://home.earthlink.net/~tacquire/t19.jpg Cool beans. Dan