Sennheiser RR840 Stereo Stethoset Receiver for Set 840-TV &amp; Set 840-S， 50Hz-16kHz Frequency Response<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Extra Headset (RR840 Stethoset Receiver) for SENNHEISER SET 840-S/-TV listening system (Not a complete system) </span></li><li><span class="a-list-item"> Purchase includes: Headset RR840， rechargeable BA300 battery (installed)， 3 pairs various ear tips and instruction manual (Transmitter is Not included) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31yS6pWgzjL.jpg" noproxy>