Sennheiser HDI 830, IR headphones for wideband transmission systems, For stereo and 2-channel applications, Frequencies: 2.3 MHz and 2.8 MHz, Battery: BA300 (included), Transmitter and charger are required for use but not included, Suitable charger available under article: (#243066#); matching transmitter: (#133682#, #167754# and #174463#)
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