Description: MK2A/MK3 can choose 12V and 24V two kinds of operating voltage, more practical. MK2A/MK3 is the use of aluminum substrate technology, that is, in the aluminum plate attached to the surface of the thermal resistance of the wire, the thermal conductivity, voltage, thermal resistance and other properties significantly better than the previous series. Anti-Alice, you can heat 110 degrees. MK2A/MK3 can be used directly as a printed substrate (can be affixed to a layer of high temperature resistant plastic tape). Specification: Material: aluminum alloy Size: 330x330x3mm Applies to: 3D printers Package Includes: 1x Aluminum Heated Bed Note: To work with 5V1A power supply Power adapter is notincluded. 300mm on the motherboard is just a mark, not the actual size, the actual size is 330mm