You can simultaneously use up to 4 paired RR 5000 or RR 2000 stethoset receivers, RR Flex receivers, or HDR 165, HDR 175 and HDR 185 headphones with the TR 5000 transmitter. Other Sennheiser wireless headphones (e.g. RS 11x series, RS 12x series, RS 160, RS 170, RS 180, RS 220) are notpatible with the TR 5000 transmitter and cannot be used.
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