Supports TX dual-stream and RX multi-point connections. SPDIF and I2S audio input/output interfaces can be switched freely. Built-in rechargeable battery, battery life is more than 20H. Supports SBC, MP3, AAC, apt-X HD, apt-X LL, apt-X audio formats. 16Mb of built-in eFlash and up to 64Mb of external serial flash memory, with a digital-to-analog conversion signal-to-noise ratio of up to 75dB. Color: Black Material: Plastic Size: 63x63x20mm Package Contents: 1 x Digital Audio Converter 1 x English Manual Only the above packaging content is included, other products are not included. Note: Lighting shooting and different monitors may cause the color of the items in the pictures to be slightly different from the actual item. The measurement allowance is +/-1-3cm.