Bluetooth-compatible 5.1 chip ensures robust compatibility and stability, supporting both Bluetooth-compatible receiving (RX) and transmitting (TX) functions seamlessly. Experience uninterrupted audio streaming with upgraded NFC technology for instant mobile pairing. Equipped with a DSP decoding chip, this transmitter delivers a rich bass effect and allows precise treble/bass adjustments at your fingertips. Enjoy high-quality sound reproduction across various music formats like MP3, WMA, FLAC, and more. Effortlessly switch between Bluetooth-compatible mode and other playback options such as U disk/TF card for added convenience. The built-in FM radio feature enables quick station search and saving, while the external remote control offers easy operation within a 5~8 meter range. Boasting an elegant design with a controllable indicator light that adjusts brightness based on volume levels, this transmitter stands out with its exclusive private model and design patent. The high-definition LED display provides clear visibility of Bluetooth-compatible status and mode settings. With a simple plug-and-play setup, this transmitter eliminates the need for complex drivers or app downloads. The built-in 1200mAh rechargeable lithium battery ensures up to 8 hours of continuous listening. Item Name: Transmitter Receiver Material: ABS Bluetooth-compatible Version: V5.1 Supported Protocols: A2DP/AVRCP/HSP/OPP/GATT/SM Working Frequency Band: 2.402GHz -2.480GHz Power Level: Power Level 2 (Class II) Sensitivity: -85dBm