Wide Application: This for bltouch kit is suitable for 3 /5 pro/-10 3d printer with 32-bit v4.2.2 or v4.2.7 motherboard. Requires a 3d printer with a 32-bit v4.2.2 or v4.2.7 motherboard. Firmware installation is simple: download for the bl touch firmware from the website and copy it to the tf/sd card, directly insert the 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 operating interface. High precision: The standard deviation of for bl-touch is about 0.005mm, which is easy to level and has high precision. For The Bltouch bed automatic leveling sensor has a simple structure and high precision. Uses: Suitable for all kinds of bedding such as glass, wood, metal, plastic and all materials. Easy to install: For The bl-touch sensor is small and easy to print when connected. Accurately measure the inclination of the hot bed and automatic z compensation to avoid unevenness of the hot bed and stable printing. colour: as shown Material: Metal+Plastic Package Contents: 1 x Auto level sensor 1 x screw pack 1 x 1.25-5P-SYP2P+3P line (170mm) 1 x 1.25-XH2P 3P cable (1.5m) 4 x cable ties 1 x Sensor fixing bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.