how to build an electric skateboard

{"cid":"91208922","title":"CE 18km To 25km 10.5Ah One Tire Skateboard 700W 13m\/H","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/3c\/35\/05a009f3c6077d5f7570a2e42467-200x200-1.jpg","attrs":{"Price":"usd 500","Brand Name":"Sun wheel","Model Number":"SA","Minimum Order Quantity":"5 pcs","Delivery Time":"5~8 days","Certification":"SGS CE","Place of Origin":"china","Payment Terms":"T\/T","Supply Ability":"10,000 pcs per month","Packaging Details":"carton box","Model":"S1","Max speed":"13mph","Range":"18~25km","Motor":"700W","Max climbe degree":"20\u00b0","Battery capacity":"10.5Ah","Max loading weight":"120kg","Charging voltage":"220v 50-60HZ","Charging time":"4~6 hours","Patterns":"customized","Name":"One Wheel Electric Skateboard","Warranty":"1 year"}}