The M6 Pro (21) is a versatile portable music player with audiophile sound quality and an open Android operating system. The two ESS Sabre ES9068AS DAC chips deliver very precise, finely resolved sound, making every detail audible, allowing you to enjoy high-end sound quality. The open Android operating system allows for the installation of any apps such as Spotify, Tidal, Qobuz, Apple Music, and more, giving you access to the vast music selection of streaming services. Additionally, the M6 Pro (21) can be integrated into any network via Wi-Fi to stream music wirelessly from a PC or NAS hard drive. With the unbalanced 3.5 mm output and two balanced outputs (2.5 mm and 4.4 mm), the M6 Pro (21) can be connected to a variety of headphones and earphones without the need for additional adapters. The M6 Pro (21) also enables wireless connection with Bluetooth headphones or speakers, providing top-notch Hi-Res Wireless certified sound thanks to advanced Bluetooth codec support. Alternatively, the M6 Pro (21) can be used as a HiFi Bluetooth amplifier when paired with a smartphone, tablet, laptop, gaming console, etc., to benefit from enhanced sound quality. Furthermore, the M6 Pro (21) can be used as a USB DAC to improve sound quality on a computer. With a massive 4000 mAh battery, the M6 Pro offers up to 13 hours of uninterrupted music playback, and thanks to Qualcomm Quick Charge 3.0, charging times are significantly reduced. To tailor the sound characteristics to your taste or music style, the M6 Pro (21) offers three digital filters and a 10-band equalizer, available through the Shanling Music App.