1、NFC Connection: Through the built‑in chip, you can touch this receiver to directly connect to Bluetooth devices that support NFC. 2、Dual Interface: This Bluetooth receiver supports two music interface modes, 5mm and RCA audio port to connect more devices. 3、15M Wireless Connection: It supports wireless connections up to 15m, so you can control music playback from a distance. 4、Bluetooth 0: Bluetooth 0 technology brings faster and more stable data transmission speed to this audio converter. 5、Wide Frequency Range: This Bluetooth receiver has a wide frequency response range of 10Hz‑20kHz. 1 x Bluetooth Receiver1 x AUX Cable1 x RCA Cable1 x USB Cable Item Type: NFC Bluetooth ReceiverMaterial: ABSFrequency Response Range: 10Hz-20kHzSignal to Noise Ratio: >110dBDistortion + Noise: < 0.02%Bluetooth Version: 5.0Interface: Stereo Analog/AUX 3.5mmEffective Distance: About 15mPerformance: HiFi LevelSupport: A2DP/AVRCP