Range is determined by a number of factors, including transmitter output power, receiver sensitivity, antenna gain and the operating environment. The ranges listed here are what we have been able to achieve using our development kits in open areas with straight line-of-sight between the antennas. It is possible to get more or less in specific environments.
The Amplified HumPRO Series can get around 8 miles (12.9km) with a good antenna (like the HWR Series) and line-of-sight. This module is great for general data transmissions.
The TT Series is designed for remote control applications and can get over 2 miles (3.2km).
The LR Series and LT Series can get around 3,000 feet (900m) and are primarily used for basic remote control but also for shorter range and lower power data transfer. Also in this same range, the KH3 Series is for remote control and the NT Series is for data transfer.
The 2.4GHz version of the HumRC Series is about 300 feet (90m) for remote control applications.