The NW-A40 series comes in a range of unique colors designed to blend seamlessly into your environment and life. Optimized for high-resolution audio, the S-Master HX amplifier reduces distortion and noise so you can enjoy all the nuances of your music. Experience the natural sound quality and intense detail of DSD audio formats. This is the recording format of choice for many high-profile producers and sound engineers and can be enjoyed via the high-quality PCM conversion of the NW-A40 series. Thanks to the wireless audio transmission via LDAC, you can enjoy sound that goes far beyond CD quality. LDAC uses a conventional Bluetooth connection but achieves maximum data transfer rates of up to 990 kBit/s—about three times as much as other audio profiles. The result is an improved wireless listening experience that comes closer to what the artist intended. When used with compatible IER-NW500N headphones, the NW-A40 series digital noise cancellation reduces the ambient noise you would normally hear. Microphones built into the headphones work with digital noise reduction to eliminate unwanted noise. Would you like to listen to music and still know what is going on around you? When using the compatible IER-NW500N headphones, you can select the ambient noise mode. The NW-A40 series then lets in external noise so you can hear what's going on around you. The NW-A40 series devices are capable of decoding and playing MQA files so you can play even more music lossless. Want to store more music on your Walkman? Simply insert an SD card (not supplied) to expand the memory. Thanks to Near Field Communication (NFC) and Bluetooth, you can access your music even faster and easier. You only need to hold your NFC-enabled device briefly to the NW-A40 series device to create a seamless connection and begin transmission in the blink of an eye.