Whatever your reason for needing TV hearing amplifiers, SEREONIC is here to help. Connect through your choice of audio ports (3.5mm auxiliary audio jack, RCA, or Optical), and transmit audio over super-reliable RF radio frequencies with zero audio lag. Change the way you watch and listen to programs, movies, music, and games with handy remote wireless TV speakers you can put right next to you anywhere in your home. Preserve your TV speaker for hearing impaired, keep the neighbors happy, and more deeply enjoy your personal time with SEREONIC assistive TV sound amplifier. SEREONIC television speakers for hearing impaired designed with durable materials that are designed to last, our wireless TV speakers for smart TV are second to none. This portable TV voice amplifier features the following: Wireless speaker with a charging docking station. Listening Time of 8 hours @ 50% level 1 hour sleep timer (once activated, the speaker shuts off after 1 hour). Headphones/wired earbuds connectivity. User replaceable battery. 3-tone control to adjust audio to your hearing. RF Transmission: 2.4GHz Frequency Speakers: 2 x 5W Class D Frequency Response: 20Hz – 20KHz Battery: 1 x 18650 3.7V Charge Time: 4+ hours Receiver Range: Up to 100 ft (30m) open field AC Adapter: Input 100-240VAC/50-60 Hz; Output 5VDC / 2000 mA Dimensions: 9” x 7”x 3.25” (24 x 11 x 8 cm) Weight: about 1.7 lbs (800g)