How many channels can be operated with Unite? – beyerdynamic Help Center | beyerdynamic

Audio Mode	Radio Type	Latency	Frequency range	Connections in DECT region EU: Up to …*	*Connections in DECT region North America: Up to …**	*Connections in DECT region Japan: Up to …**	Remark
HD (High quality)	Broadcast	~22 ms	50 – 14.000 Hz	32	14	14	One master device (TP,TH,AP4) transmits to multiple receivers (RP,RP-T). Robust signal quality due to retransmission of the signal
SD (Standard quality)	Broadcast	~19 ms	50 – 7000 Hz	32	20	20	One master device (TP,TH,AP4) transmits to multiple receivers (RP,RP-T). Robust signal quality due to retransmission of the signal.
HD (High quality)	Full-Duplex	~18 ms	50 – 14.000 Hz	32	14	14	Bi-directional connection between two devices: RP-Talkback or Sub-Master (TP, TH) and Master device (TP,TH,AP4)
SD (Standard quality)	Full-Duplex	~14 ms	50 – 7000 Hz	32	20	20	Bi-directional connection between two devices: RP-Talkback or Sub-Master (TP, TH) and Master device (TP,TH,AP4)

Important notes:

The values for the maximum number of available channels are "up to" and can be achieved under ideal RF conditions.
The actual number of available channels that can be used simultaneously depends on the RF power setting and the environmental conditions.
The number can be additionally reduced by other DECT services in the same environment.
When using multiple Unite AP4 access points in the same receive/transmit area, the maximum number of channels can only be utilized if the access points are synchronized with each other to ensure stable operation.