LOAD CAPACITY: 80KG USER AGE: 6-10 years of age MOTOR CAPACITY: 18V/150W BATTERY CAPACITY: 18/V7AH CHARGING TIME: 7-8 hours TRANSMISSION SYSTEM: Strap or chain? Strap. MAXIMUM SPEED: 20KM MAXIMUM RANGE: less than:7KM/hour more than :10KM/hour DIAMETER OF TIRE:10inch*3.0*4 N.W:19KG G.W:23.5KG 108*36*59CM 280PCS/40HQ 108*37*59CM 272PCS/40?