For 10 points and a comm slot this upgrade allows you to receive orders at any distance.
At 10 points Long-Range Comms is fairly pricey for what it does. But can still be useful on high value units. If you do take it limit it to one or maybe two to a list.
This upgrade is best used on high value units that tend to operate far from your commander and also demand critical timing due to their fragility or preferred target selection such as the T-47 or the Speederbikes. At 10 points a piece though they are quite pricey, 4 Long-Range Comms cost as much as a basic troop unit and wont provide the same utility through a game. However one Long-Range Comm on a key unit can win a game for you.
Core Box, AT-RT Expansion, AT-ST Expansion, T-47 Airspeeder Expansion, 74-Z Speederbike Expansion