Description If you have any questions or concerns, please do not hesitate to message us. Bluetooth Audio Adapter Transmitter Receiver - Bluetooth 5.3 Transmitter Receiver for TV Home Stereo Bluetooth Adapter for Receiver Wireless Audio Adapter with Low Latency RCA AUX 3.5mm [Three-in-one design]: Support Bluetooth receiving (RX), Bluetooth transmitter (TX), FM transmitter mode. Equipped with HD LED display, working status and Bluetooth mode can be clearly seen. With multi-function keys, one - click switch mode, or play/pause music, easy to operate. Support wireless music listening, hands-free calling, navigation, make your driving safer [Hi-Fi surround sound]: Built-in new generation Bluetooth 5.3 chip, stable and fast transmission, reject lag lag. Equipped with DSP digital audio processor chip, can manually adjust the treble and bass, make the sound clearer, enhance the surround sound, equipped with aptX lossless transmission technology and intelligent noise reduction system, audio details more dynamic [Remote wireless connection]: Bluetooth receiver adopts the latest 5.3 version of Bluetooth wireless communication standard, external 2.4G Bluetooth signal transceiver antenna. Bluetooth-free connection with a maximum distance of 30 meters /100feet, stable transmission, clear noise free [New upgrade function]: Upgrade the wireless connection technology of NFC function. The mobile phone can automatically connect when it is near the induction area. Note: The mobile phone must support NFC connection function. It can be connected with external microphone with 6.5mm interface. Infrared remote control can realize microphone volume/sound mixing/sound elimination and other operations, so as to enjoy music anytime and anywhere [Super battery life]: Built-in 1200mAh battery, support receiver uninterrupted transmission for up to 8 hours, battery life of about 30 days, can be used while charging. Enough to listen to music and talk hands-free on long trips. Comply with safety certification, longer service life [Multiple audio modes]: Support Bluetooth audio and FM radio sound signal transmission and reception, support TF/USB playback, MP3/APE/FLAC/WAV/WMA and other audio formats Product model: M9 Pro Bluetooth version: Bluetooth V5.3 Supported protocols: A2DP/AVRCP/HSP/OPP/GATT/SM Working frequency band: 2.402GHz -2.480GHz Power level: Power level 2 (Class II) Sensitivity: -85dBm<0.1%BER Signal-to-noise ratio: 90dB Distortion: 0.1% Interface type: Input: 3.5mm AUX+RCA+FM+USB+TF interface+6.5 MIC Output: 3.5mm AUX+RCA Radio parameters: FM 87.5-108MHz Supported formats: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTY Screen size: 36*8MM Working current: <40mA Built-in battery: 3.7V/1200mAh Charging current: about 1000mA (MAX) Charging time: about 1.5 hours Battery life: RX about 8H, TX about 8H Bluetooth distance: 30M (open space) Charging method: Type-C 5V/1A Compatible devices: Android, IOS system mobile phones, active speakers, amplifiers and Bluetooth speakers or headphones that support A2DP/protocol for connection and use