The SA700 is an evolution of technology and design that delivers the ultimate sound to Astell&Kern original design and sensibility. With the latest technology, the deeper and stronger sound of the SA700 delivers new experiences and values not found in other products.The SA700 is the first DAP to use a AK4492ECB Dual DAC to give a new sound signature. AKM’s AK4492ECB is a DAC that aims to achieve the best performance in the industry by utilizing the technology obtained by developing AK4497EQ.It has a lower power consumption and similar audio performance compared to AK4497EQ, making it the best DAC for a portable DAP. Only Astell&Kern’s Sound Technology know-how has made the DAC’s performance even more perfect. Now you can enjoy premium sound close to the original performance with the SA700 and the AK4492ECB.The SA700 uses stainless steel, which is corrosion-resistant and durable, for maximum material strength and beauty. It’s capable of bit-to-bit playback up to 32bit 384kHz and native DSD playback up to 11.2MHz, delivering detailed, distortion-free sound just as the artist intended. The LEDs around the volume wheel are not just visual effects, but provide the listener information including volume and status of the currently playing song. Different colors are displayed depending on the bit depth of the song being played, and 150 levels of red saturation are displayed to reflect the current player volume.SA700 maintains the convenience of Astell&Kern’s UI combined with a new GUI that reminds users of their 1st generation players. The Open APP Service enables the user to install specific APK music streaming apps to the device. Copy the desired APK into the Open Service folder of the product and install the relevant App in the Menu-Service of the product.