Eriseng has great R&D ability. There are eight professional electronic and structure engineers. All of them have several years' experience in electronic cigarette production. We also have a perfect after-sales service system, which is very important. Since electronic cigarette is a new product, most customers need technique support or training to ensure their sales. All of our products have passed CE, RoHS and SGS certifications. "Good quality with competitive price" is our promise to all worldwide custo...