changing from prepayment to credit meter

{"cid":"91176406","title":"Single Phase Two Wires Prepaid Energy Meter RF Card Prepayment with Overload Display","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/35\/67\/9fe28b3c8a3161531c767bd7a513-200x200-1.jpg","attrs":{"Price":"Negotiate","Brand Name":"Radarking","Model Number":"DDSY150\/RF","Minimum Order Quantity":"100pcs","Delivery Time":"30days","Certification":"IS09001; IS014001; IEC62052-11; IEC62053-21;","Place of Origin":"Made in China","Payment Terms":"Western Union, T\/T, L\/C","Packaging Details":"Standard Package","Rated Voltage":"230V","Rated Current":"5(100)A","Rated Frequency":"50Hz","Pulse Constant:":"400 imp\/kwh","Power Consumption":"Less than 1W\/phase","Data Storage Period":"More than 10 Years"}}