Sonic chronometer – Hello Chronos [€199] from Germany's Violelectric. It's a mobile DAC cum headamp with USB-C, mico USB and Lightning umbilicals to mate to sundry smartphones or tablets. Measuring 44.5 x 24 x 10mm, it houses a 32/384 PCM and DSD256 DAC plus headphone driver capable of dispatching 30mW/32Ω or 5mW/600Ω. Over iOS, Android and WIndows 10, no driver install is required and a max 200mA consumption promises civilized power draw from the host device's battery.