The Yocan Kodo Pro is a super small 510-thread battery that brings precise temperature control and portability to the table. It works with a wide range of cartridges, features an LED screen, USB-C charging, and a preheat function, making it a solid choice for vapers who want flexibility without paying a premium. Variable Voltage Range: 1.8V to 4.2V Battery: Built-in 400mAh Charging: Type-C Display: Digital OLED Pre-heat function: Yes, 10sec Device Size: 53mm x 20mm x 17mm