Why would I buy from Itop, when Bitmain is selling them direct for $1000.00 cheaper? And even @ Bitmain price of $2307 + $75 shipping to USA...

https://bitmaintech.com/productDetail.htm?pid=0002015081407532655504JMKzsM067B

It would take 122 days to ROI WITHOUT POWER COSTS NOR DIFFICULTY INCREASE. Add in power costs (approx 1/2 of daily earnings) and difficulty, This device WILL NEVER ROI.

Run away! You are throwing good money after bad on this folks.