They haven specified the motor brand but it does come with a 48/21amp battery and 25 amp controller here is the quote
SONDORS Mid-drive system, 750 Watts continuous power, 1152 Watts peak. Integrated 25 Amp controller. With the mid-drive motor, riding feels just like a non-motorized bike when pedaling because the system can completely freewheel. The motor includes pedal assist sensors (PAS), allowing you to choose the power level of motor assistance that you would like while pedaling. At any time, you can use the throttle instead to engage the motor.
I don't know for sure, but my guess is a custom type of M600