This four position antenna switch has N-type connectors for extra low loss. Particularly used with VHF/UHF frequencies. Handles 2500W PEP, covers up to 650 MHz. Center ground position, lightning surge protection built in. Negligible insertion loss. This is a used unit with cosmetic defects but works to original factory specifications. The picture is of our SO-239 model, but this one indeed has N-type for all of the connections.