The YoCan Uni Pro is an upgraded version of the YoCan Uni. With the pro, the voltage is fully adjustable from 2.0V to 4.2V. Just like the original YoCan Uni, you won't have to worry if the atomizer is too tall or too short. The UNI Pro will let you adjust the height to any oil atomizers

FEATURES:

• Built-in 650mAh battery
• E-juice level window
• OLED display
• 10 second 'pre-heat' function
• Micro USB charging port
• Short circuit protection
• Cartridge size adjustment dial
• Height adjustment button