If you’re looking for the Aipas S1 Amp I tested in this video, this is the link I used. For the money, the power is honestly insane, and even though it didn’t hit a true 50 MPH on my GPS, 44 MPH is still wild for this class.
Pros
+Insane power for the price (4,000W mid-drive)
+Full suspension felt smooth and planted off-road
+Dual hydraulic brakes felt solid and controllable
+Battery kill switch is a nice security/safety touch
Cons
-Speedometer reads high versus GPS (about 6–7 MPH off)