? [What's Included & Warranty] The HIFI WALKER H2 includes 1 x HIFI Music Player, 1 x 64 GB MicroSD card, 1 x USB type C charging cable, 1 x Quick Guide, 1 x Flannel Storage Bag. We offer a 30-day money-back guarantee and a 1-year manufacturer warranty. If you have any questions during use, please feel free to contact us. We will provide a satisfactory reply within 24 hours. ? [DAC Input, Expandable Storage] This lossless music player can function as a digital source by connecting it to a USB amp with DAC input, and can also be used as an external decoding amplifier when connected to a mobile phone or computer. It supports expandable storage of up to 256GB with micro SD cards and USB OTG (OTG cable not included). The system can handle up to 14,999 songs. ? [Easy Operation & Humanized Design] This portable audio player with a 2.0-inch HD display and intuitive ALPS scroll controls lets you navigate your music player easily. Line out and earphone out port for flexible usage including in car auxiliary cable or a home audio system. Small size and high-grade zinc alloy chassis make it perfect for on-the-go listening. ? [MP3 Player with Bluetooth] This bluetooth MP3 player features 2-way Bluetooth 4.2, which supports high-definition wireless audio using Qualcomm aptX technology. It can work as a sender to deliver signals or as a receiver to amplify music wirelessly. You can enjoy up to 10 hours of uninterrupted high-fidelity audio through headphones or a Bluetooth device. ? [High-Res Lossless Music Player] With an SNR of 103dB@1KHz, This H2 Hi res DAP delivers crystal clear audio, capturing every note and detail. It supports distortion-free HiFi music in all popular file formats, including FLAC, MP3, WAV, AAC, OGG, AIFF, WMA, APE, DFF, and native DSD (up to 128 bit/5.6 MHz), utilizing the renowned Texas Instruments Burr Brown PCM5102 DAC.