NBPOWER 48V/72V 80A Dual Model Sine Wave Brushless DC Motor Controller Ebike Controller + UKC1 Color Display One Set，Used for 3000W, 5000W Ebike Kit.

Most excellent. Sinewave controllers are the newest in cutting ede technology, and this item is no diffent. All the wires are labeled, and this controller includes the throttle, so once you plug those together, it plugs into your ebike brake levers and motor (green blue yellow wire) with hall sensors. Square wave is a thing of the past, and with more and more ebike on the market, you the buy must know what is good. I'll make it simple: Squarewave=stock, cheap, not too great at delivering power when you want it, and damages easily when (voltage, amperage) parameters are changed. Sinewave=newest in quality motor controllers. Sinewave delivers power in a very soft power curve, so your motor sees more power gradually like running down a hill, rather than falling down a giant set of stairs, like with a squarewave, (go to youtube and search sinewave vs square wave and you'll know what I'm takling about). Because the power is increaseed in that way, the motor makes less noise, and is more efficient with its incoming power, which I'm very happy to announce, this controller handles beautifully. Seams a little pricey, but soon you will never go back, and if you burn out somthing, this controller can switch motors and/or batteries nicely(When I said burn something out, I deliberately meant something other than this controller, it is very rugged. It is 2KW-3KW. Its size leaves something to desire, like a black controller bag long enough to fit it, but You'll manage. If you're like me, you will sew a black bag to fit this long silver machine. If your not the sewing type, go to amazon and search for long black bike case and you will be happy to know your needs con be met.Short story, too late for that, but this is excellent, and any ebike nut wanting to keep up with cars after the light turns green will want this. Even if your not looking to boost top end speed, this controller will boost efficiency to the max, even on 48v1000w kits. No need to update your motor, but you might like a new battery in the long run.I and the seller are happy to assist you with your buying and ebike questions, just don't forget to ask. 😀-PhilP.s. Im not being paid by the company to write nice things, but if you looked ar how many reviews I have writen in the past six months, you'd know that this is a really great item worthy of my review. Also I apologize for my bad grammar!While I'm at it, this item has a one year warranty, and all your need to pay is shipping, if you should need new parts, but you shouldn't😄

Like the controller actually thanking of buying another one

The best controller out of about 8 hitting 50 miles an hour with no problem with 5000 watt hub and a 50 h a battery.