simolio ir wireless tv headphones, tv hearing devices for digital & analog tvs, tv listening headphones for seniors and hard of hearing with voice highlighting, balance and tone adjustment sm-863d simolio <b>important!</b><br>1. compatible with digital optical / analog rca & 3.5mm audio connection. perfect for streaming media playing from your smart tv directly.<br>2.the infrared diodes on the transmitter must be in direct line-of-sight with the headset when using the system for best performance. there cannot be anything blocking the direct signal.<br>3.us standard power adapter only.<br>4.if you are not get used to this stethoscope design headset, you can consider simolio over-ear tv headphone or portable tv speaker.<br>5.very helpful for the moderate hearing impaired people, but not recommend to severe hearing loss.<br><br>features:<br> (1).apply with the speed of light infrared technology to send the television's audio to the headset, it doesn’t need to be paired or adjusted, it is completely safe with pacemakers and will not interfere with your wifi or telephone, perfect for senior apartment or nursing home.<br><br>(2)adjust the sudden changed high volume to protect your hearing via auto signal control (asc).<br><br>(3)customize a comfortable volume level via balance & tone adjustment.<br><br>(4)benefit from voice highlighting & noise cancelling tech, it dynamically reduces tv background sound and make the tv dialog stand out which ensure a better understanding of the tv story.<br><br>(5)it overcomes the weakness of regular hearing aids which amplify the target audio sources and environmental noises at the same time.<br><br>(6)the built-in mic make you amplify conversation with people nearby.<br><br>(7)headset with auto power off when no signal is received for 10 minutes.<br><br>(8)replaceable & rechargeable li-battery & convenient charging dock, one full charge supports 15 hours tv watching depending on the average volume settings.