MSI INSSDU nav selector 97-10335A 28 volts. Purchased as working to resell. Powered up fine on power supply, which is all the testing we can do. No connector or paperwork. Can be returned within 30 days for any reason. 

*This item is guaranteed to be fully functional when received (unless otherwise described), but airworthiness is determined by the FAA-trained mechanic performing installation and is the responsibility of the buyer.*