CONNECTOR - UHF Female (Hole inside) and SMA Male (pin inside) Impedance :50 ohm;Temp.range: -65~ +165℃(PE Cable -~ +85 ℃),Insulation resistance :5000MΩ. APPLICATION -Widely used for BaoFeng Radio,HF Radio,Antennas, Broadcast, CB Radios, Wi-Fi, Telecom, Coaxial cable, LMR, Wireless LAN Devices, CCTV, Microwave Applications and Digital Communication System ADVANTAGE - Premium Adapter Necessary,Tight Fitting,Low Lossy,Wrench Flats and works well to adapt from rooftop scanner antenna to RTL-SDR dongle