| 1. | Sennheiser Stereo Receiver RI 150 User Guide QTj SEIMNH EISER 1150 IR Audio Transmission Technology Receivers General Description The Rl 150 is an extremely lightweight wideband stethoset receiver which uses the carrier frequency 2 3 MHz thus offering excellent transmission reliability It features an easy to operate on off volume control and is powered by the environmentally friendly BA 151 rechargeable NiMH accupack delivered with the receiver The audio logy variant Rl 250 is fitted with an additional recessed |
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