The Sigelei 213W temperature control box mod is the newest flagship box mod from Sigelei. The redesigned chassis is constructed of zinc alloy with a black carbon fiber trimming. The fully upgraded smart chip set, supports the following heating elements in temperature control mode: Nickel, Titanium, Stainless Steel (304, 316, 317). The Sigelei 213 features both TRC and TFR functionality with a five coil memory bank. The unique bottom sliding battery door, encases the two 18650 batteries (sold separately). The Sigelei 213 has a newly designed OLED Display Screen featuring a three column and four row display matrix. The Sigelei 213W Mod clearly displays the wattage, voltage, resistance and battery life with its new integrated OLED display. The Sigelei 213W TC Mod contains a stainless steel 510 threaded gold-plated connection for attaching your favorite atomizers. The sophisticated Sigelei 213 is one of the best mods of the year.