Parameters: The latest version, supports LDAC, HD, AAC, at the same time, supports Android and , LDAC supports 24BIT94K transmission and can be compatible at the same time Truly lossless transmission, the same level of sound quality as CD LDAC can reach up to 990kbps. -X HD maxes out at 576kbps. 5.0 Bluetooth CSR8675+PCM5102A decoding, support LDAC, HD. True 5.0 module. The PCM5102 decodes independently and adopts the I2S protocol transmission, which is much the Bluetooth playback board without decoding output. The decoding further improves the sound quality and resolution. Not comparable to general toy-level bluetooth audio output. The signal-to-noise ratio is 112db, and the 2.1V RMS audio voltage is directly output. The high frequency is not glitchy, the low frequency is full, and the dive is good. In order to have a lower output impedance and good matching output, the HIFI op amp AD823 is used. This IC is used on the Colorful Classic Player C4. The sound performance is clean and stable, the sound level is rich, and it has good control. Regardless of the design and material of this board, it has been revised and screened many times, regardless of the cost, to achieve better sound quality and better experience. TYPE: A-without case LDAC has three modes: sound quality priority mode (990kbps), standard mode (660kbps) and connection priority mode (330kbps), the names of the three modes may be different on equipment produced by different manufacturers. Using the sound quality priority mode can make the transmission rate reach 990kbps, so as to achieve lossless music playback. Generally, the mobile phone defaults to the connection priority mode, and you can set the sound quality priority mode by yourself. Power supply (while ensuring better sound quality, it should be more convenient for many occasions) More convenient dual power input interface, only need to connect one (any one), no need to connect two. (Please use a high-quality power supply, the power supply can directly affect the sound quality) DC socket input (5.5X2.1): 8-15V power supply DC adapter (above 300MA). -USB input: 5V -usb charger (500MA or above). Output (multiple interface output, more convenient connection) Material: PC+metal colour: black Package Contents: 1 x Audio Board 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.