The AK XB10 is a wireless headphone amplifier equipped with Bluetooth and an aptX HD chip capable of transmitting audio signals in HD quality from 24 bit up to 48 kHz. Hardly larger than a coin, it can be quickly stowed away in a trouser or shirt pocket. Alternatively, it can be attached to clothes with the integrated clip, which is ideal for athletes in particular. The device is operated from the top, which is conceived as a click controller. With its asymmetrical construction and engraved control icons, the functions can be easily felt and handled by touch.