If you're working with 4G LTE antennas or other wireless devices, these SMA Female to TS9 Male adapters are exactly what you need for making the right connections. You get 2 adapters in the package, which is great because you can keep one as a backup or use both in different setups. The impedance is 50 ohm, which is standard for most WiFi, 2G, 3G, and 4G LTE GSM devices. Basically, these little connectors help you bridge the gap between SMA Male (that's the pin inside type) and TS9 Female (the hole inside type) connectors that you often find on various networking equipment. Tenmory makes them, and they're designed as high-value connectors that don't compromise on performance. Whether you're setting up a cellular antenna for better signal, working with wireless routers, or dealing with any equipment that uses these connector types, having the right adapters on hand saves so much frustration. They're small enough to carry in your toolkit but make a huge difference when you encounter compatibility issues between devices. I always keep a few of these in my electronics kit because you never know when you'll need to make an unexpected connection work. For the price, having two reliable adapters ready to go is definitely worth it for anyone who tinkers with wireless equipment or networking gear.