Features: - Flagship-grade portable Bluetooth USB DAC/AMP. - Stable Bluetooth connection with the latest Qualcomm QCC5125 chipset. - 3.5mm + 4.4mm + 2.5mm headphone sockets. - Independent HiFi architecture featuring the ES9038Q2M DAC chipset. - Usable as a USB DAC. - SCC intelligent switching. - Independent charging and USB data input. - Automatic USB mode setting. - Clear and crisp performance due to high-quality internal structure. - 7 digital filters for sound adjustment. - Elegant design with a transparent front and metal chassis. - NFC support. - 2-stage gain adjustment. - Powerful output power (up to 320mW). - Small and lightweight design. - Up to 8 hours of battery life. ================ Returns and cancellations are not accepted. Bulk purchases, exclusive listings, and various event support are possible (category changes, relisting, etc.). If you purchase with other items, we will discount the shipping cost. Please comment if you wish. For those who wish, we will give away a used earphone carrier or unused ear tips at random as a bonus. Please leave a comment with "with bonus" when making the transaction. We are also listing on other platforms, so we may delete the item without notice if it sells out. #HiFiGo# #Muse #HiFi #M4 #Headphones #Amplifier #Portable #dac #amp #bluetooth #usb #ess #es9038q2m #25mm #35mm #44mm