This is a controller kit for 27"  LM270QQ1 . The controller board is with 2 DP ,2 HDMI input port . Please select the right lcd model (kit type) when placing the order. As the kit is configured basing on the lcd model number. Else we can not take the responsibility of the incompatibility. Hope for understanding. Please make sure the LCD model number is the original.  Some sticker of the model number can be wrong. To make everything go well, you'd better to take some pictures of the Lcd cable and the backlight cable.  So that our engineer can double check it for you and send you the right kit. Specification: The board in this kit is with 2 X HDMI+2 X DP input ports . This kit is for  LM270QQ1(SD)(A2)/ LM270QQ1(SD)(C1)/LM270QQ1(SD)(B1)/LM270QQ1(SD)(A3) /LM270QQ1(SD)(E1)/LM270QQ1(SD)(F1) Max.resolution：DP 5120*2880 @60HZ HDMI-compatible 3840*2160 @60HZ （For some Graphic Cards, single DP can support up to 5K resolution.  But most of the time, to make sure that it can reach 5k resolution, you will need to connect 2 DP cables instead.） Power adapter input :   12V ,  5A/6A/7A .   12V DC is a must . The center pin of the DC jack is + . Function: 1. Support HDMI2.0 protocol 2. Support DP1.1 ,DP1.2 protocols; 3. Support PIP, PBP and four pictures (Note: These functions are supported under 5K resolution.) 4. SupportDP, MST and SSTfunctions at the same time 5. 4K Support Freesync and Freesync2 6. Support HDR function ( HDR can not be turned on at 5K resolution.) 7. Supporting functions in menu: automatic screen adjustment, brightness and contrast control, color balance and color temperature control, OSD   menu positioning 8. Support Chinese and English language 9. Support remote control Notice: 1. Please make sure that your LCD is in good condition before bidding this item, else you will be responsible for the incompatibility. 2. If you are not specialized in electronics or have doubts in operation, please contact us for instruction, as we are not able to responsible for wrong operation. Package Include: 1 X Controller Board 1 X  backlight  cable1 X LCD cable 1 X Keypada few other necessary cables for this kit   Note that this item does not contain customs duties