Add Bluetooth Feature to Old Devices---Airfrex Bluetooth transmitter is able to turn your old devices, such as TV, iPod, MP3, MP4, PlayStation PS4, Laptop, Desktop, CD player, Nintendo Switch into Bluetooth enabled. So you can continue using these devices and music players with your Bluetooth headphone or Bluetooth speaker or Bluetooth receiver. However, this is a Bluetooth transmitter and it won't pair with your new version iPod ( new iPod has Bluetooth function). | Ultra Small Size with Great Battery Life---Due to the extremely tiny size and light weight, Airfrex wireless transmitter offers more portability, you don’t even feel its weight when you plug it into your iPod or other music player. However, its battery life lasts up to 9 hours every full charge. | Easy to Pair and No Sound Quality Compromise— Airfrex Bluetooth Sender applies the Qualcomm 4.1 Bluetooth Chipset which offers high quality sound and wider compatibility; it can pair with your Bluetooth headsets or Bluetooth speaker within 20 Seconds. | Works with Any devices that have the AUX (3.5mm) output or RCA (Audio OUTPUT L &R) output, this Bluetooth adapter also supports using when it is charging, you can plug it into the wall charger and have it connected with your Bluetooth Soundbar all the time. | This is a Bluetooth Transmitter (Male) NOT a Bluetooth Receiver (Female), Bluetooth Transmitter only pairs with Bluetooth Headphone or Bluetooth Speaker or Bluetooth Receiver. Bluetooth Transmitter doesn’t pair with your Smartphone or iPad or other tablets. If it fails to connect with your devices, please reset it in this way: during charging, long press the button for about 10 seconds until you see the blue led stops and red led blinks one time, then release the button.

Custom Made for Sennheiser HD Series Wired Headphones. This wireless music adapter works as a wireless audio streaming converter for the Momentum series headphones, Sennheiser HD598 / HD598Cs / HD598SE / HD595 / HD599 / HD559 / HD569 / HD579 / HD518 / HD558 Headphone replacement cable cord connector and converter. | Excellent Sound Quality. This Bluetooth audio receiver has a dedicated Texas Instrument headphone amplifier chipset built-in which makes it more dynamic and rich in details. The output is much more powerful, it can drive the over ear headphones with larger impedance, so this is a wireless receiver plus a headphone amplifier and it is perfect match for Sennheiser HD series headphones. | Optional Bass Boost Feature. Airfrex Bluetooth receiver has preset EQ function which allows users to turn on or turn off the bass enhancement feature if needed, this feature can compensate the bass performance for their headphones or speakers, users just need a simple double click to switch this function. | Latest CSR Bluetooth 4.1 Chipset. This wireless stereo adapter applies the most advanced CSR Bluetooth chip which ensures this is lossless in audio transmission which is a huge difference from those low quality Bluetooth adapters. You need a high quality headphone adapter for a good Sennheiser headphone. | Built-in Microphone for Phone Call. Our music adapter also has built-in Microphone which allow the users to pick up or end a phone call by a simple press on the button, so they won’t miss any phone call even during music listening.

AF57 Bluetooth receiver is custom designed and made for Bose SoundTrue2 and AE2 and OE2 Series headphones, including SoundTrue and AE and OE Headphones. | CSR Bluetooth4.1 chip with lossless audio transmission and dedicated headphone amplifier chip with high quality sound performance. | Long Bluetooth distance and stable Bluetooth signal,the Bluetooth range is up to 33 feet and the Bluetooth signal is very stable and strong, there is no cut in and out, no breaking up at all | Built-in microphone and easy to pick up or end a phone call by a simple press of the button. Note: this adapter ONLY works with the Bose SoundTrue and AE and OE series headphones. | One full charge of the battery lasts 6 hours for the above Bose SoundTrue and AE and OE headphones. Note: this adapter ONLY works with the Bose SoundTrue and AE and OE series headphones

Lossless Audio Transmission: Airfex AIU5 Bluetooth adapter uses the most advanced CSR Bluetooth 4.2 chip which provides an extremely fast audio signal transmission in lossless format; you won’t tell a difference even in your CD grade hifi audio by using our Bluetooth jack. | Unrivaled Sound Performance: Airfrex AIU5 Bluetooth receiver adopts the latest TI (Texas Instrument) headphone amplifier chipsets, which offers an excellent sound quality featuring in deep in bass, warm and rich in vocal and crystal clear in high frequency. So, AIU5 is a headphone amplifier and DAC more than just a Bluetooth converter. | Optional Bass Boost: AIU5 wireless receiver applies headphone DSP and equalizer chipsets inside, which provides an option for the user to add extra bass to their music or compensate the low frequency response for their headphones or home theatre speakers or vehicle stereo car audio. So, AIU5 wireless audio adapter is a wireless Bluetooth connector with EQ feature. | Talk with Hands-free: AIU5 wireless adapter also has the fine tuned microphone built inside, users are able to pick up any phone calls and have hands-free phone conversation during driving or listening to their headphones. It is a perfect Bluetooth car kit for drivers. | Non-stop Playing up to 200 songs: AIU5 wireless converter is able for continuous playing up to 200 songs every full charge. It takes 90 minutes for a full charge and it is able to power over ear headphones for 6 hours non-stop playing and 12 hours for car audio. Moreover, this Bluetooth music adapter supports using while charging.