Sennheiser RS 175 Wireless headphones with transmitter orders for TV

Product Name: Sennheiser RS 175 Wireless headphones with transmitter orders for TV
From the Sennheiser website: https://en-us.sennheiser.com/wireless-headphones-home-audio-rs-175 The Bass Boost and Surround Sound listening modes will allow you to experience your home entertainment system like never before – the former increases the audio bass response while the two virtual surround modes offer a more spatial and livelier stereo sound. Sennheiser's RS 175: Home entertainment just got more entertaining! What's in the box? HDR 175 headphones orders TR 175 transmitter Optical cable (and an Optical 'spliter' in case you have a soundbar to connect to your TV, too) Audio cable Power supply with 4 adapters (EU, UK, US & AU) 2 AAA NiMH rechargeable batteries Quick guide RS 175 Hold the "on" switch for 4 seconds to eliminate the frustration of no power to the headset! PRO: This is a GREAT headset system CON: Remember - - you have to hold the "ON" switch for 4 seconds or it will not turn on! There is no mention of this anywhere I could find.