The most efficient USB miner ever manufactured is available in limited quantities! The 2Pac features 2 Bitmain BM1384 chips (same chip in S5) and a fully adjustable regulator design that gives you a core voltage range of 550mV to 800mV. Typical hasrate is 15+gh/s depending on clock rate. Efficiency is .31-.35 watts per gh.
15+gh/s mining speed(Higher speed requires usb port above spec)
31-.35 watts per gh!
Completely silent operation
2x Bitmain BM1384 chips