This is a reclocker USB converter which Steve at Empirical has recently brought up to the Off Ramp 4 standards with Superclock 4 upgrade, and the latest version downloads. This one supports sample-rates of up to 24/192 and uses Asynchronous USB protocol*, which is optimum for reducing jitter. It is a reference quality 24/192 interface that will outperform the very best and most expensive CD transports and music servers as well as for the first time, competing with vinyl. It also has a WBT Nextgen Ag Silver Coax upgrade.
But it gets even better ! This one comes with a 12 Volt 22 Ah Sealed Lead Acid Battery power supply and it's dedicated wall charger. COMPLETELY off the electrical grid for a ZERO noise floor and blackest background. It will play up to 3 days non stop before needing to be recharged overnight, which can be done with the music still playing.
Easily the best deal on a USB converter on the net today.