Features: With the new version of Bluetooth compatible V5.0, it can provide the best transmission efficiency, stability and ultra-low power. Supports LDAC AptX and AptX Low Latency, with high-resolution CD-quality stereo audio streaming; Supports AAC advanced audio codec for audio and music storage, suitable for use on mobile phones, tablets and headphones; Unique 3D surround sound function: With the 3D sound button, you can switch to 3D mode and enjoy HiFi surround sound from a regular audio source. Integrated microphone for hands-free calling; Continuous streaming and automatic repair: Equipped with a high-quality 300mAh polymer battery, it can provide up to 12 hours of use time, while supporting charging and streaming, and can be automatically repaired with existing paired devices. Ultra-stable connection: Our Bluetooth compatible audio adapter is equipped with a Bluetooth 5.0 compatible chip, which enables stable pairing, fast transmission and a wide signal range (10 meters). It can be connected to non-Bluetooth compatible car stereos, home stereos, wired headphones/speakers, amplifiers/home theater systems and more via 3.5mm AUX ports and 2 RCA ports. Specifications: Material: Plastic Size: approx. 6x6x2cm/2.36x2.36x0.79in Model: MR230PRO Bluetooth Compatible: BT5.0 Support: LDAC aptX Wireless Adapter With: 3.5mmAUX and 2RCA Battery: Built-in 300mAh polymer battery provides up to 12 hours Plug adapter: EU/US/UK/AU Note: Note: This is only a Bluetooth compatible receiver, not a transmitter. So you can't use it for your TV, keyboard or mouse. Due to the problems of lighting effects and shooting angles, there will be some tolerances in the product, please understand. Please allow 0-1cm error due to manual measurement. Package includes: 1 Set AudioReceiver