Purchased around September of last year, but have hardly used it. This is a US version import. Accessories are as shown in the photos. It has a power plug with a ground, so please prepare an adapter if necessary. ■ Product Overview FIIO's top-of-the-line DAC-integrated headphone/preamplifier headphone amplifier, achieving further performance improvement with a dual ES9038PRO configuration. ■ Main Features Equipped with dual ESS flagship DAC chips "ES9038PRO" Supports PCM384kHz/32bit, DSD256 playback Equipped with two "THX-AAA 788+" headphone amplifier circuits jointly developed by FIIO and THX Achieves a fully balanced design from the DAC section to the amplifier section Dual femtoclock configuration that suppresses jitter to the limit with the latest generation XMOS chip and two ultra-high precision crystal oscillators Board separation layout that realizes pure signal transmission with thorough low noise and low distortion Completely separates the power supply for the digital and analog sections. Separate design power supply circuit that achieves low noise, high stability, and high durability Equipped with the Renderer function of the latest music format "MQA" Equipped with Qualcomm's SoC "QCC5124", supports high-quality wireless Bluetooth audio codecs such as LDAC, aptX HD, and aptX Adaptive Equipped with an ADC volume control function that solves left/right volume imbalance and enables fine volume adjustment 3-stage gain switching function that enables optimal volume adjustment from high-sensitivity earphones to low-efficiency headphones Abundant input/output terminals that can be used as a high-performance DAC/preamplifier, in addition to balanced headphone outputs compatible with both XLR 4-pin and 4.4mm Supports "FIIO Control App" that allows you to operate various settings via Bluetooth Gold finish stainless steel volume knob, sandblasted aluminum alloy body for a sharp exterior finish FiiO K9 Pro ESS Brand: FiiO