Very little use (see photos). Some display has dot defects. No problem with use. Operation confirmed by specialist. Can be used with PS4 and PS5, no compatibility issues. (This is based on my own operation tests, not what the manufacturer claims.) Has a significant effect on the immersion of games and the win rate in FPS games. Use with optical output in that case. Complete accessories. No box. 0.5dB precision volume control Volume can be precisely adjusted in 0.5dB steps. Because processing is performed in the digital domain, it is possible to completely eliminate the channel imbalance (gang error) and crosstalk. DSD 11.2 MHz, PCM 384 kHz / 32bit compatible USB-DAC The USB-DAC function supports DSD 11.2 MHz and PCM 384 kHz / 32 bit input. The DSD transmission method supports native playback with ASIO drivers and DoP (DSD over PCM Frames). In addition, it also supports asynchronous mode, which controls with a master clock generated by the DA-310USB's ultra-low phase noise clock oscillator, without using a clock with a lot of jitter on the PC side. The D/A converter uses a high-quality DAC that supports 384 kHz / 32 bit, which is also installed in full-size Hi-Fi components such as Super Audio CD players. Digital isolator that shuts out PC noise To eliminate the adverse effects on sound quality caused by high-frequency noise flowing in from source devices connected to the USB-B input and coaxial digital input, a high-speed digital isolator is installed. Data transfer is performed magnetically via a transformer coil built on the IC chip, transmitting only music data. It shuts out noise that affects delicate audio signals. Denon DAC