pwm for hho

{"cid":"91219651","title":"DC 10-50V 60A PWM Motor Speed Controller HHO PWM RC 12V 24V 48V 3000W","imgUrl":"https:\/\/img.ismap.com\/nimg\/0b\/47\/f69e89d439cd997c0fc847d11a93-200x200-1.jpg","attrs":{"Price":"negotiable","Model Number":"10-50V 60A Controller module","Minimum Order Quantity":"10pcs","Delivery Time":"5-8 work days","Place of Origin":"Guangdong, China","Supply Ability":"1000 Piece\/Pieces per Day","Type":"dc dc converter","Brand":"creatall","Payment Method":"T\/T & Western Union & Paypal","Port":"shenzhen port. guangzhou port","[driving voltage] DC:":"7-12V","[Working current]":"\u22641.2A","Display":"LED Digital Display","Product Name":"PWM Motor Speed Controller","Protection":"Over-current, Over-voltage, Short-circuit Protection","Storage Temperature":"-40\u2103-85\u2103"}}