Features: and Extensive application: this bltouch kits works fit to ender 3 v2 or 5 pro or CR-10 3d printer with 32 bit v4.2.2 or v4.2.7 mainboard. Requires 3d printer with 32-bit v4.2.2 or v4.2.7 motherboard. Easy firmware installation: download bl touch firmware and copy it to tf or sd card from website, directly insert tf or sd card and power cord. Then press the switch. Wait a few seconds for the firmware to install. Note: Each machine has its own operator interface. High accuracy: the standard deviation of bl-touch is around 0.005mm which makes leveling easy with pinpoint accuracy. Bltouch bed automatic leveling sensor fulfilled simple structure and high precision. Usage: could work with all kinds of bedding materials, such as glass, wood, metal, plastic and and all materials. Easy installation: 3 different mounting brackets allow installation on multiple 3d printers. The bl-touch sensor is small in size, convenient printing when connected. Accurately measure the slope of the hot bed and the automatic z center line compensation, avoid the uneven hot bed so as to print stable. Package Includes: 1Set x auto-leveling sensor kit 1PC x sensor for fixing bracket 4Pcs x nylon cable loops Specifications: Material: plastic, metal Color: As shown Size: Automatic leveling sensor (wxh): about 25x40mm or 0.98x1.57inch Sensor support (wxh): about 38x2 0mm or 1.5x0.79inch note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.