Name: BLtouch Auto Bed Leveling Sensor 
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<br />Compatible FDM 3d printer.(unavailable for Chitu)
<br />-BLtouch is an auto leveling sensor for 3D Printers based on open-source. 
<br />-Simple, Smart, High-precision It could work with any kinds of bed materials, such as glasses, woods, metals, and so on.
<br />Support  steering engine , Marlin ,Repetier ,Smoothieware,etc.
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<br />-BLtouch can be operated in the following condition.
<br />-One I/O for control (PWM or Software PWM)
<br />-One I/O for Zmin(Z Probe)
<br />-GND and +5V  power
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<br />Packing List
<br />1*BLTouch Probe
<br />3*M2.5 Screw
<br />3*M2.5 nut
<br />2 *Dupont Housing Shell 3Pin
<br />2 *Dupont Housing Shell 2Pin     
<br />10*Dupont Terminal
<br />1*10K  1/8W Resistor for Smoothieboard
<br />1* 240 K  1/8W Resistor for 3.3V Logic Level
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<br />Notice
<br />Additional power supply can be needed in case which your board does not supply enough amperage.
<br />Electronic devices can be damaged or even destroyed if connected to the wrong side polarity.    [wrong terminal connect to 5V(+) and GND(-)]
<br />Install BLTouch as far as it possible from magnetic, motor, fan etc.
<br />The action as pulling/pushing hard the push-pin can make the BLTouch damaged and less accurate.
<br />Fix push-pin with locking paint after reassembling or adjusting core.
<br />Please do not change the position of the hex screw(core).
<br />Do not separate or deform elastic material attached on the push-pin.
<br />The action(Pull or push push-pin hard) makes damage and lowers the accuracy of TL-touch.
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<br />Official Documents
<br />https://www.indiegogo.com/projects/bltouch-auto-bed-leveling-sensor-for-3d-printers#/
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<br />3D STL
<br />http://www.thingiverse.com/search/page:1?q=BL-touch
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<br />Video
<br />https://www.youtube.com/results?search_query=BL-TOUCH