ESYNIC NFC Bluetooth Audio Receiver Bluetooth 3.0 Music Receiver Wireless Speaker Adapter with RCA 3.5mm Output for iPhone 7 7Plus iPod iPad Android Samsung Home Car Music Steaming Sound System NFC Function Available: Bluetooth 3.0 with NFC Function, Losslessly Stream your Audio Entertainment Instantly from any Bluetooth or NFC-Enabled Smartphone Bulit-in USB Charging Port: The Receiver is Built in UBS Charging Port, Support USB 5V DC Output, When Listen to Music, you can Also Charge your Smartphone by the Receiver at the Same Time. Hands-Free Built-in Microphone: Built in Microphone, Not Only Stream Audio Entertainment, But Also to Answer Phone Calls if your Phone is Connected RCA and 3.5mm Output Jacks: RCA/3.5 mm Audio Jack Which is the Standard for all Home Stereo Equipment up Until Recently, so it Easily Interfaces with anything Older System Support: All Bluetooth Audio Device; Can Connect with 3.5mm Headset, Stereo System, Speaker; NFC Available Device (Note: Power in 5V DC, the Product is NO Built-in Battery); Upgrate your Home Stereo Sound System Now