Feature:1. NFC device can use NFC function, touch to connect, no need to connect manually.2. Through BT transmission, accurately in the current audio broadband, enjoy high-definition HiFi sound quality.3. Built-in signal antenna, no dead angle of signal, stable transmission of 15m without obstacle.4. Using high-performance combination chip, stable music playback without delay.5. Wide application range, intelligently compatible with all devices with RCA/AUX/USB audio interface.Specification:Item Type: NFC Wireless ReceiverMaterial: ABSBT Version: V5.0 + EDRBT Protocol: A2DP / AVRCPDecoding Chip: CSR5.0BT Distance: <15m / 16.4ydInterface: RCA / AUX / USBFrequency Range: 10Hz-20kHzSignal to Noise Ratio:> 110dBImpedance: 75Distortion + Noise: <0.02%Multiple Audio Output Ports, Approx. 3.5mm / 0.14in Earphones, Stereo System, Speakers Can Be Connected: SupportUSB 5V DC Output: SupportCharge for iPad / iPhone: SupportSystem Support: All BT Audio Devices; NFC Available Devices.Package List:1 x NFC Wireless Receiver1 x USB Power Supply Line1 x RCA to Approx. 3.5mm Adapter Cable1 x Approx. 3.5mm Audio Cable1 x User Manual