Sennheiser Flex 5000 Digital Wireless Audio System for Headphones 506821, NOB Contents: Receiver, Charging Base, AC Adapter, Accessories, Manual, Box. New Open Box Condition. Features: Crystal clear digital wireless transmission for freedom of movement (up to 200 ft.). Connectivity Technology : Wireless Three selectable hearing profiles optimize speech and music playback. Speech Intelligibility feature reduces TV background noise for greater dialog clarity. Volume and balance control Digital and analog inputs provide installation flexibility