Audio Express AXBT21 5.0 Bluetooth Audio Receiver Adapter,NFC Wireless Bluetooth Extender,3.5mm AUX or RCA Input Speaker,Amplifier,Car Audio,Headphone,Home Audio and Component Receivers

[Widely Compatible] Rich Interfaces: , AUX. This 5.0 receiver transmitter can connect to any active speaker with a standard 3.5mm port or 2RCA port, which is very suitable for home theater, stereo and car speakers, as well as smart phones, an [Support Auto Startup Shutdown] Use the charging cable to connect your car or other power sources. When the car starts or has electricity, it will auto turn on and auto connect to the device you connected last time. When the car is turned off, it will aut [Stable Connection and Stereo Sound] With latest chip and software, the adapter not only helps to upgrade your old devices to capable without replacing them but also a CD like auditory feast. Tap to pair with for NFC equipped [2 in 1 Adapter] In TX mode, the transmitter is plugged into non devices such as TV, PC and MP3 player via AUX and transmits to headphones, speaker, soundbar; In RX mode, the receiver can be connected [Work While Charging] Built in battery can support a full charge of the adapter at one time. Support 8h for receiving and 5h for transmitting. When in a low battery state, the adapter can be plugged into the power supply for charging while worki