Nfc Enabled Bluetooth Audio Receiver For Sound System,3.5Mm Bluetooth Audio Specification: [AUTOMATIC PAIRING] Supports NFC near field pairing, which automatically turns bluetooth wireless connection on or off during pairing. [BLUETOOTH FUNCTION] The adapter can connect to traditional device like wired headphones or speakers so they can receive Bluetooth music direct from phones and tablets. [ADVANCED TECHNOLOGY] Using the latest power isolation technology, to ensure the perfect sound quality, let you love the music. [3.5MM INTERFACE AND USB FLASH DRIVE PLAYBACK] 3.5mm AV output interface, more compatible. USB flash drive playback is supported. [STABLE TRANSMISSION] Provide more stable and faster transmission with less power consumption, which can represent a superior sound quality.