The AK4493SEQ, which adopts velvet technology, has started shipping a decoding chip with excellent vocals, dynamics, details, and extensions. AK4493S and AK449OR suppress noise caused by interference from multiple frequency components through low distortion technology. At the same time, a higher spurious free dynamic range (SFDR) has been achieved, making sound reproduction more natural, suppressing mutual modulation components such as 200Hz, 60OHz, 1.2kHz, etc., and achieving mutual modulation distortion of -116dB. The AK4493 version is connected to the computer through the TYPE-C interface, which enables the computer to connect to an external USB sound card. The two buttons can be pressed long or short to increase or decrease the volume and select up and down songs. The Bluetooth version of AK4493 ES9038 can be used alone, as well as polished amplifiers and active speakers, with excellent sound quality! Colour:Black Material:ABS Package Contents: 1 x Bluetooth decoding module 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.