Maybe you are a DVR purchasing manager, who are looking for high quality DVR, and SASSIN INTERNATIONAL ELECTRIC SHANGHAI CO.,LTD. are a professional manufacturer & supplier that can meet your needs. Not only DVR we produced have certificated the international industry standard, but we can also meet your customization needs. We provide online, timely service and you can get professional guidance on DVR. Don't hesitate to get in touch with us if you are interested in DVR, we won't let you down.