Flat Slim/Flat Mini: 350mAh to 900mAh Battery Capacity USB Type-C Charging Technology Variable Voltage Setting Pre-heat Setting 15-second Safety Cut Off New Square-shaped Design 510-threaded Connection Kodo Pro Dimensions: 52.7mm by 20.1mm by 17mm Battery: 400mAh Voltage Range: 1.8-4.2V Preheating Function Chassis Material: Zinc-Alloy Intuitive Firing Button Screen: OLED Diplay Screen Two Adjustment Buttons Lanyard Attachment Point Threaded 510 Connection 15s Overtime Protection Charging: Type-C Port