Air Intellisonde IS-5A Digital Radiosonde Weather

This sale is for an A.I.R. Inc. Intellisonde IS-5A series Digital Radiosonde. Frequency is 1680 MHz. Measures temp, humidity,pressure and battery digitally. These gov surplus items are new, unused in sealed bag. I have removed one from its container for the photo. The unit is shipped with 9 volt batteries installed but these have been in gov storage for years so lets assume the batteries would need to be replaced. Please purchase for experimental use - specs are available online.