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 Receiver Material: ABS BT Version: V5.0 + EDR BT Protocol: A2DP / AVRCP Decoding Chip: CSR5.0 BT Distance: <15m / 16.4yd Interface: RCA / AUX / USB Frequency Range: 10Hz-20kHz Signal to Noise Ratio:> 110dB Impedance: 75Ω Distortion + Noise: <0.02% Multiple Audio Output Ports, Approx. 3.5mm / 0.14in Earphones, Stereo System, Speakers Can Be Connected: Support USB 5V DC Output: Support Charge for iPad / iPhone: Support System 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