For Sure-Fi, Frequency Hopping makes our signal highly resistant to interference and difficult to intercept.
The existence of license free frequency (ISM) bands at 400Mhz, 800Mhz, 900Mhz, 2.4Ghz, and 5.8Ghz has led a flooding of radio signals, particularly in congested areas such as apartment buildings, businesses, stadiums and similar situations. This overlap can lead to collisions, slowdowns or even lack of connectivity altogether. This is particularly true where multiple standards use the same frequencies such as Wi-Fi and Bluetooth, and where standards and companies are pushing the limits of power and range.
This push for higher data tends to drive developers to higher frequencies, because higher frequency bands allow for higher bandwidth. However, there is a penalty for this trend in that the higher the frequency the less it will penetrate objects. Therefore, the lower frequency bands tend to be more robust.
Sure-Fi operates in the 900 MHz ISM band, which is the perfect balance of signal strength, penetration power and data bandwidth.