Apologies to anybody who used my Contact Form - it hasn't been working since 22 Feb but is now fixed on 15th March! ............................................................................................................................................................................. All devices now have the option to recharge while device is playing without any sonic detriment. ............................................................................................................................................................... Now all the superior sonics of battery operation without any battery charging worries. You can use a separate USB port for charging or an external power supply to power the internal battery charger. Completely portable high-end sound running from a laptop. Runtime from a fully charged battery if disconnected from charger is 20 hours. .............................................................................................................................................................. The JKDAC32 is one of the few full 32bit 384KHz DACs available today - check it out