Note: This link features three models: Z6, Z8, and F12. The Z6 and Z8 have a maximum speed of 20 MPH, while the F12 reach up to 25 MPH. Each model incorporates a different number of shock absorbers. Please ensure you select the correct model before purchasing. Note:This product has three speed settings. The rated power on the lowest setting is 500W, and the maximum output power on the highest setting is 1000W. Model:Z6Frame Material Alloy Steel Tyre type Pneumatic Tire Voltage (V) 48V Motor High speed brushless Battery 18650 Capacitance 10Ah Power (W) 500W(Peak 1000W) Number of Speeds 3 Speeds Model Z6 Packing box size 50.79*25.59*8.66 inch Speed 20MPH Waterproof Level IPX7 Range 35Miles Weight (KG) 28.1KG Motor driven Rear drive Gradeability 15°-20° Tire size 14 inch Brake Device Rear Mechanical disc brake Model:Z8Frame Material Alloy Steel Tyre type Tubeless Pneumatic Tire Voltage (V) 48V Motor High speed brushless Battery 18650 Capacitance 13Ah Power (W) 500W(Peak 1000W) Number of Speeds 3 Speeds Model Z8 Packing box size 42.52*8.27*23.62 inch Speed 20MPH Waterproof Level IPX7 Range 40MPH Weight (KG) 25.7kg Motor driven Front drive Gradeability 20°-25° Tire size 14 inch Brake Device Rear mechanical disc brake Model:F12 Frame Material Alloy Steel Tyre type Pneumatic Tire Voltage (V) 48V Motor High speed brushless Battery 18650 Capacitance 15Ah Power (W) 500W(Peak 1000W) Number of Speeds 3Speeds Model F12 Packing box size 52.0*8.3*25.6 inch Speed 25MPH Waterproof Level IPX7 Range 45Miles Weight (KG) 23KG Motor driven Rear drive Gradeability 15°-20° Tire size 14 inch Brake Device Rear Mechanical disc brake the item is certified to UL 2849 standards