Check the listing for details. Astell&Kern AK HB1 Portable Bluetooth DAC/AMP USB C Or Lightning. Color: Black, Condition: Used, Made in South Korea (Republic of Korea). Listed at 180.00 USD. Very lightly used, maybe 4 hours in total as it is a back up to other DACs. Sounds great. Missing original usb c OTG cable so including a Questyle one. Has the longer charging cable and lightning OTG cable The Astell&Kern AK HB1 Portable Bluetooth DAC/AMP is a high-quality hi-fi amplifier designed for on-the-go use. With Bluetooth, USB, and USB-C audio inputs, it supports a variety of audio modes including AAC, aptX™, SBC, LDAC, and aptX™HD. This sleek black device features a headphone jack, 3.5mm unbalanced, and 4.4mm balanced audio outputs, providing versatile connectivity for different audio setups. Made in South Korea, this portable amplifier from Astell & Kern delivers exceptional sound quality in a compact package.