Features: Experience seamless double mode connectivity with the activate Receiver & Transmitter, featuring fast pairing and 10 meter wireless sound transmission for clear sound in both / modes. Equipped with general 3.5mm/ outputs and 64GB card compatibility, this metal built device supports MP3//WMA/waves/APE formats while maintaining safe 5.25V charging for multi device sound streaming. Ideal for audiophiles, commuters, and home users seeking cable easy solution to upgrade smartphones, tablets, or speakers with premium wireless sound conversion capabilities. Perfect for enhancing car stereos, home theater systems, or parties effortlessly stream music via while maintaining stable connection within 10 meter ranges without interferences. Enjoy automatic reconnection and plug and play convenience, with stored pairing profile enabling fast wireless sound transmission between smartphones and systems for uninterrupted entertainment. Specifications: Component : metal Diameter: about 725mm/2.85inch Package Includes: 1xReceiver Transmitter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.