This is a high-resolution, high-quality DAC equipped with the CX31993 chip. The sound quality is significantly better than the headphone jack on your smartphone. It has a USB-C terminal, so it's compact. I've confirmed it works with my Android smartphone, MacBook Air, and Surface. The photos were taken after opening for the shoot, but the item to be shipped is brand new, unused, and unopened. It will be packaged with air padding and shipped via Yu-Packet Post Mini. The color is blue. Below are the manufacturer's specifications. This is the performance of the chip itself, so please use it as a reference. Brand: GraveAudio DAC Chip: CX31993 Output power: 65mW Sampling rate: 32Bit/384KHz SNR: 128db DNR: 120db THD+N: 0.0003% DSD: 64-128 Output interface: Type-c