The AK HB1 is a portable Bluetooth DAC and headphone amplifier that allows you to experience high-quality audio and HiFi streaming services with outstanding performance - all without annoying cables. Pair your smartphone or tablet via Bluetooth with the AK HB1 and enjoy wireless HiFi sound through your earbuds or headphones. Additionally, the AK HB1 delivers the flawless sound quality of Astell&Kern through its USB DAC function, even when connected to a smartphone, tablet, or computer via USB cable. To ensure optimal usability for both Android and iOS devices, the package includes both a USB-C and a Lightning cable. The AK HB1 can also be used to enhance sound quality with gaming consoles. It is equipped with Qualcomm's CSR8675 Bluetooth chipset, which supports the transmission of high-resolution audio formats and ensures a stable connection. The ESS ES9281AC PRO DAC provides reliable digital-to-analog conversion. The built-in amplifier offers a solid output power of 4 Vrms (in balanced mode). The AK HB1 features connection ports for 3.5 mm unbalanced and 4.4 mm balanced earbuds and headphones. It ensures crystal-clear voice quality thanks to the high-quality MEMS microphone technology from Knowles and Qualcomm's cVc Generation 8.0 technology, which suppresses background noise and delivers clear voice quality to the recipient. Weighing only 40 grams, the AK HB1 has a very slim design, with buttons and headphone jacks cleverly integrated into the gaps between the front and back housing. The intuitively designed dial fits comfortably in the hand and allows for effortless volume control due to its size and placement.