1. Hollyland Intercom uses 1.9GHz DECT with AFH (Adaptive frequency hopping) technology, which can be used with other different frequencies such as 2.4GHz or 5GHz wireless devices. However, there may be wireless interference and quantity limitations when using wireless devices of similar range with 1.9GHz in the same scene
2. Different region has different frequency, for CE versions up to 7 sets of Hollyland Intercom systems can be used simultaneously within the range of the hub, and the interval between the hub should be more than 0.5m to avoid interference from each other.
3. Try to use within LOS to get the best wireless performance, concrete walls and people will attenuate the wireless signal. The host can mount 1.7m high to reduce the wireless signal blocking from human body