Features: 1. The lightest dual 21700 box mod 2. Waterproof PCBA for easy cleaning 3. Fiberglass reinforced PC enhances durability and toughness of mod 4. Firmware upgrade, 200W max power 5. Various modes: Power/Bypass/Voltage/TC-NI/TC-SS/TI-TI Mode 6. Multiple protections: Short Circuit/Over-heating/Low Battery/Open Circuit/10S Cut off/Overcurrent Protection Size: 96.5*30*58.8mm Battery Type: Dual 21700 (not included) Operating Voltage: 6.4V-8.4V Output Voltage: 0.5-8.0V Charging Current: 1800mA (+-5%) Power Range: 5-200W Working Current: <50A Coil Resistance Range: 0.05-3ohm Package: Gift Box The Box Contains: 1 x Gaur-21 Mod 1 x Instruction Manual 1 x Warranty Card 1 x QC Type-C USB Cable 1 x Proper User Guidance 2 x 18650 Battery Adaptor