The Yocan Uni Pro Plus is a versatile 900mAh universal cart battery featuring a 1.8-4.2V range and a comprehensive set of cartridge adjustments. With the original cartridge stabilizing features, this device accommodates vape cartridges of all sizes, ensuring a snug fit through height, width, and diameter adjustments. Its wide range of voltage output levels makes the Yocan Uni Pro Plus the perfect companion for all your cartridge requirements!