Features: Universal additional heating bed power expansion module high-power module for 3D printers. Can be used on Chitumainboards and other open 3D printer mainboards. Help 3D printers equipped withcontroller boards (up to 15A) become more powerful. With this additional module, theMaximum current of the leads on the boardcan reach 25A. If you plan to use the heating bed with a 3D printer using a 12V power supply, it is recommended to use this module, otherwise it may cause excessive current and burn out the connectors on thecontroller board Note: If your total electricity consumption is 240W and you have a 12V power supply, then thismeans thatat least 20A (20X12=240W) is required. Since thecontroller board can only use 15A, this setting will not work. In order for it to work, you need thisadditional power module. This module can be used for Chitu mainboards and other open 3D printer mainboards. The module operates stably under normal cooling at I Maximum=25A, and the operating current should not exceed 25A. Specifications: Material:Plastic Color: Black MaximumCurrent: 25A(Enhanced heat dissipation) Size:approx 6x5x3.1cm/2.36x1.97x1.22in Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 1cm errors due to manual measurement. Package includes: 1Set Heat Bed Expansion Power Module(Mainrboard is not included)