The 900 MHz radio system is at a lower frequency and will penetrate surfaces more easily ; while 2.4 GHz systems are more reflective and tend to be affected more by buildings, foliage or moisture that can attenuate the signal.
The 900 MHz radio system is at a lower frequency and will penetrate surfaces more easily ; while 2.4 GHz systems are more reflective and tend to be affected more by buildings, foliage or moisture that can attenuate the signal.