China 12v dc fan speed controller

{"pid":"51666843","cid":"372188","pimg_url":"\/\/img1.b2bforus.com\/82\/9d\/2afbf3188dda\/product\/202022654_s-w400xh400.jpg","name":"Adjustable USB 5V Step up Boost a DC 12V 3 pin 4 pin Conector de velocidad del ventilador Controlador de velocidad del ventilador Cable de adaptador de alimentaci\u00f3n para PC","company_name":"Wuhan Lanxu Technology Co., Ltd.","attrs":{"Precio":"CN\u00a513.09\/pieces 300-999 pieces","MOQ":"300 pieces","El tiempo de entrega":"Negotiable"}}

{"pid":"9384390","cid":"16949","pimg_url":"\/\/img1.b2bforus.com\/a7\/0c\/4a64d576eb91\/product\/22442147_s-w400xh400.jpg","name":"Ventile el control de velocidad variable sin cepillo centr\u00edfugo impeledor\/12V de la fan de DC de la purificaci\u00f3n","company_name":"Ofan Electric Co., Ltd","attrs":{"Precio":"negotiation","MOQ":"1pcs","El tiempo de entrega":"5-8 work days","Marca":"OFAN"}}

{"pid":"22599974","cid":"122676","pimg_url":"\/\/img1.b2bforus.com\/d4\/31\/1d77f2a50fcb\/product\/76418591_s-w400xh400.jpg","name":"Factory Products 5V Speed Control PWM 12V DC Fans XYJ24B4020 for 3D Printer","company_name":"Shenzhen Xinyujie Technology Co., Ltd.","attrs":{"Precio":"Negotiable","MOQ":"100.0 Pieces","El tiempo de entrega":"Negotiable","Marca":"XINYUJIE"}}