LoseHu The standard is that the frequency must be one of 67, 88.5, or 118, and this value is fixed. Unlike the standard, the user can set their own frequency. Many cranes and hotels use non-standard frequencies, which allows K5 to scan for frequencies. However, it cannot scan their non-standard frequencies, so even if you know the frequency, you cannot communicate with them because they often occupy amateur radio frequencies. Using a non-standard frequency is very useful. Thank you for your hard work in developing this.🍗