Sigelei launches their new and modern high-end box mod, the GW TC Box Mod, a highly powerful, accurate, and sophisticated device combined with the capability of using dual 20700 & 21700 or 18650 batteries (sold separately). The GW utilizes the advanced Sigelei chipset capable of 10 to 257W of output, full temperature control support, and precision and accuracy that rivals the best devices available on the market. The GW's temperature control technology suite has native support for standard TC heating elements, and TCR functionality with Degree based settings. The Colored TFT display features a vibrant display of all the essential listings that the users need to see from ohm reading to battery life. Driving the entire system are two high amperage 18650, 20700, or 21700 batteries (batteries sold separately). The GW 257W TC Box Mod by Sigelei is a powerful performing 257W Box Mod that is truly advanced yet easy to use for anybody who are getting into the vaping industry or have prior experience for it.