Brand new usb stick miner manufactured in the USA by legendary GekkoScience (Sidehack) using S17 BM1397 chip. Currently the most efficient USB miner ever manufactured. You must provide extra cooling (table fan, usb fan, etc) when running the miner because these can get very hot (especially when running over 400 MHz frequency) Requires powered usb hub that can supply 2 amps per port! Top speed running on 800MHz with 5 amps (25w) per port per usb miner is 500+ GH/s!!Clock speed is 400MHz to 800 MHz producing speeds ranging from 200-500 GH per device.

Compatible with Windows, Mac and Linux OS using cgminer software. Includes user manual with instructions for easy setup. Completely silent operation, includes silver mini heatsink to cool miner but requires a powered usb hub (10 watts per miner per port) to run. High Speed: 350 GH++ (Running at clock speed of 545 MHz Higher speed requires usb port above spec). To reach max speed of 500GH you will need 3amp usb port per miner!. Stock hashing speed: 200 GH (please note: these miners run very hot and you must provide active cooling such as fan). Powerful bitcoin miner in the mini usb stick, can mine any SHA256 such as btc, btc cash, digitbyte, etc.