person shared audio experiences, such as family gatherings, classroom teaching, etc. Long - distance Transmission:After passing the Class I test, its effective transmission distance exceeds 80 meters, far exceeding the coverage of typical Bluetooth devices. This gives users unparalleled flexibility and freedom of movement in larger spaces. Whether in a spacious living room, conference room, or outdoor area, a stable connection can be maintained, significantly improving the usability of the device. Long Battery Life:The MR278 is equipped with a 1000mAh rechargeable battery, which supports a battery life of over 15 hours in Bluetooth mode and more than 8 hours in Broadcast Audio mode, reducing the trouble of frequent charging. This feature makes it especially suitable for long - distance travel or long - term use, allowing users not to worry about power shortage affecting their usage experience. Model: MR278 Bluetooth Version: V5.3 Bluetooth Protocols: , APT-X series audio (including apt-X HD, apt-X Adaptive), LC3, Broadcast Audio Power Class: Class I, Class II Input/Output Interfaces: Optical (Toslink), Coaxial, USB, AUX Effective Range: 80M (Class I tested) BT Mode: Traditional Bluetooth function, LE Audio function Mode: Broadcast Audio Connection Characteristics: BT mode one-to-one, mode one-to-N Operating Time: 15 hours (BT mode), 8 hours ( mode) Battery Capacity: 1000mAh Charging Time: Approximately 2.5 hours Input Voltage: DC 5V MR278 in the market with its advanced Bluetooth technology, flexible operating modes, wide applicability, excellent battery life, and outstanding long - distance transmission capabilities. It is an excellent choice for consumers who pursue a high - quality life and professionals who need efficient tools. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage:AC230-240V Color: Black Material: plastic Package Contents: 1 * Host 1 * Power adapter 1 * Charging cable 1 x 3.5MM audio cable 1 * Optical fiber cable 1 * Coaxial cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.