Features Auto Stirring: Comes with auto stirring function, this ink cartridge ensures higher efficiency and better printing effects. Better Design: Equipped with liquid level sensor, stirring motor and air filter, simple in operation and stable in working. Reliable Work: Designed to have a large capacity of 500ml, the ink cartridge suits perfectly for UV printer, very reliable. Good Material: Combining high quality PE, stainless steel and PCB materials, not easy to malfunction and also very durable. Power Supply: Powered by 3V button battery and has LED display, the whole printing progress is very clear and convenient. Specification: Item Type: Auto Stirring Ink Cartridge Material: PE, stainless steel, PCB.  Function: Automatic stirring ink cartridge.  Cartridge Capacity: 500ml Motor Voltage: 24V Applicable Ink Tube Specifications: Approx. 4 x 3mm / 0.16 x 0.12in Adapter Battery: 1 x 3V CR2032 button battery 210mAh (shipped with built in battery) Package List: 1 x Auto Stirring Ink Cartridge 1 x Switch Note: Please use an appropriate ink tube to avoid leakage during use. Package List 1 x Auto Stirring Ink Cartridge 1 x Switch