SMSL DA-8S User Manual page 13

Features
German Infineon's new technology class D power amplifier chip, higher quality,
efficiency up to 92%, further reducing power consumption;
Using NJRC's electronic volume control chip NJW1194 from Japan, precise
volume control and low distortion;
The true fully balanced design, from input to speaker output, greatly reducing
distortion caused by signal transmission;
Built-in SMSL SDB patented sound and treble/bass adjustment for easy matching
of a variety of speakers and music;
New Bluetooth 5.0 reception, better sound quality, longer transmission distance;
All aluminum alloy CNC precision processing shell, anodizing technology and
chamfering process, exquisite workmanship and delicate touch;
OLED display and user-friendly operating system are simple and easy to
understand, equipped with full-featured remote control function;
Low power standby function to meet the latest European ErP2 standard;
A large number of professional Hi-Fi audio components are used to enhance the
sound experience;
High quality gold-plated input and output terminals;
Perfect protection circuit for overheating, overcurrent, etc.
High quality power adapter specially designed for audio.