Features:* Wide Application: This bltouch works kits fit for ender 3 v2/5 pro/CR-10 for 3D printer with 32 bit v4.2.2 or v4.2.7 motherboard. Requires a 3d printer with 32-bit in v4.2.2 or v4.2.7 motherboard.* Easy firmware installation: download bl touch firmware and copy it to tf/sd card from website, directly insert tf/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 about 0.005mm, which facilitates leveling with accurate accuracy.* Bltouch bed automatic leveling sensor has met simple structure and high precision.* Application: it can work with all kinds of bedding materials, such as glass, wood, metal, plastic and all materials.* Easy installation: 3 different mounting brackets allow you to install on multiple 3D printers. The bl-touch sensor is small in size, convenient to print when connected.*Accurately measure the inclination of the hot bed and automatic centerline compensation z, avoid uneven hot bed to print stable. Specifications:Specification: Material: Plastic, Metal Color: As shown in the picture Size:Auto Leveling Sensor (wxh): About 25x4 0mm/0.98x1.57 inchPower Assist Sensor (wxh): about 38x2 0mm/1.5x0.79 inchPackage Contents: 1 Set x Auto Leveling Sensor Kit1pc x Sensor for Fixing Bracket4pcs x Nylon Cable Harness