Ultroner Sphinx DNA250C Box Mod made of Stainless Steel & Stabilized Wood. The stab wood has a semi-gloss finish, making it extremely ergonomic and also results in an improved appearance. The Ultroner Sphynx DNA250C Mod works with dual 21700 batteries but is also compatible with 20700 and 18650 batteries with the two included battery adapters. A hinged battery door at the bottom permits easy access to the battery bay. Easy charging via the micro USB port on the control surface and the included cable. The USB port also functions as the firmware update port or to customize the settings via Escribe. Ultroner Sphinx DNA250C Box Mod is powered by Evolv DNA250C Chipset. The maximum achievable output is 200 watts and has multiple working modes, which are POWER (VW) / TC (NI200/ SS/ Ti) / TCR modes. And, the mod operates in temperature control mode with nickel, titanium and stainless steel heating elements up to 600 degrees Fahrenheit. At the top, you will see a 510 connector that is compatible with atomizers up to 24mm, without any overhang.