REVIEW update after software update"....definitely improves sound quality of dac mobiles like Samsung S9 and clearly changes sound quality to audiophile on Mi poco F1 phone...10% to 20% volume increase than phone on low gain and more than 30% on high gain....after update it's much powerful on High gain....90% volume of M11PRO....Even driving my Sundara & 250 ohm Beyerdynamic dt 1770 pro loud and clear....much powerful like dual dac Daps and NX4DSD...First thing noticed...wider soundstage with needed imaging....Clearer clean forward vocals than M11PRO...Dark background with almost no distortion even on 100% volume increase on both dongle plus phone ...Trebles have sweet peak point without being harsh..literally takes sound in audiophile range with enjoyble coherent sound signature with having amplification power like big boys like NX4 DSD, ibasso dx160 and M11PRO..all tested on 3.5 mm with Solaris and also tested 4.4 mm output with SUNDARA...I think Looto Paw S1 is powerful beast on high gain mode...sound quality almost 70 to 80% to M11PRO(90% volume of M11PRO when compared both on high gain)...Looto Paw S1 is new game Changer ...!!