... 3,li-battery 36V, 7/8/9/10 A MATERIAL:magnesium alloyFOLDING SIZE640X280X810mmEXTENDED SIZE1255X490X1090mmWEIGHT≤23kg (including battery)MAX LOAD 75kgWheel ... IT UP.3, THE BIKE IS MAINLY USE MAGNESIUM ALLOY, ANTI CORROSION, ANTIQUAKE, with tenacity.4,A NEW DESIGN AND PERFECT CRAFTWORK ... MOTOR.7,FOLDABLE AND PORTABLE, CANE BE PUT INTO TRUNK Magnesium alloy electric Foldable Bike with lithium battery