Check the listing for details. Bluetooth 5.3 Wireless Transmitter Receiver HiFi Audio Music Adapter AUX RCA NFC. Color: Black, Condition: New. Listed at 23.99 USD. Bluetooth 5.3 Wireless Transmitter Receiver HiFi Audio Music Adapter AUX RCA NFC Features: -Bluetooth 5.3 chip design, compatibility and stability is stronger. -Bluetooth receiver (RX), Bluetooth transmitter (TX) two-in-one design. -Receive mode upgrade one tow two, can connect two mobile phones at the same time to listen to songs. -Equipped with high-definition LED digital display screen, full-screen display of the working status and Bluetooth mode is clearly visible. -Built-in digital signal to analogue chip, support digital optical, coaxial, AUX, RCA interface. -Upgrade the wireless NFC sensor function, mobile phone connection/disconnection at the touch of a button. -Cool RGB colourful lights, multi-colour adjustable, soft and not blinding. -Built-in 1000mAh rechargeable high-capacity lithium battery, full of about 1.5h, about 10-12 hours of continuous listening, standby for about 30 days. -Support USB (U disk) playback and launch, support a variety of lossless format audio file playback. -Built-in high-definition microphone, support wireless listening, hands-free calls, navigation. -Simple connection, without any driver and the tediousness of downloading APP. Specification: Product Model:M13 Bluetooth version: Bluetooth V5.3 Support protocol:RX:A2DP AVRC TX:A2DP Operating band:2.402GHz-2.480GHz Power Level:Power Level 2 (Class II) Sensitivity:-85dBm