Item Type: BT Audio Receiver Material: ABS BT Version: V5.0+EDR, Class 2 BT Protocol: A2DP AVRCP Effective Distance: Approx. 10m/32.8ft Interface: RCA AUX USB Frequency Range: 10Hz-20KHz Signal to Noise Ratio:> 110dB Impedance: 75Ω Support NFC Function 1、BT 0 Chip: It can ensure high fidelity BT audio signals to stream music to speakers or home stereo systems that do not have this function.  2、Easy to Set Up and Use: Plug and play. Comes with a USB power adapter. Stream music from any of these via any stereo system that supports standard 5mm or RCA jacks.  3、Long Distance Wireless Connection: ML200 home stereo BT  receiver can receive music up to 10 meters away, control music more conveniently, and enjoy music freely.  4、Support NFC: Built in chip, support NFC mobile phone device touch connection without manual connection, turn non wireless devices into wireless devices through BT audio receiver.  5、Easy to Enjoy: Let you enjoy high quality music while playing, and easily realize the home speaker to play the music in the mobile phone or tablet, so as to better enjoy life.