For Qualcomm QCC3084 Bluetooth 5.4 chip Supports LDAC/AptxHD protocols, 24bit/96kHz bitrate transmissionEnthusiast's computer USB professional decoder Italian Amanero Combo module digital interface, DSD512 hardware decoding, PCM 384kHz/32BitLDAC/AptxHD lossless protocol transmissionU disk play Supports up to 512 folders and can store and play up to 99,999 music files.USB flash drives or external hard drives must be formatted as EXFAT or FAT32, and support is available up to 2TBTFT full color display Intuitive display and clear operation Input status, signal format, volume level, playback status, file informationDynamic range: greater than equal 121dBHarmonic distortion (THD):less than equal 0.0005%Frequency response: 20Hz-20kHz (±0.06dB)RCA output level: greater than 2VrmsRecommended headphone impedance for this phone: 16-350 ohmsInput voltage: DC12V/1A(The product printed words may vary depending on the batch, but this does not affect use)Type:No USBColor:As ShownMaterial:Aluminum AlloyPackage Contents:1 * HIFI DAC Earphone AmplifierOnly 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.