What's in the box:

3D Printer Auto Leveling Sensor 3D Touch Auto Bed Levelling Kit 3D Printer Accessories for Printing Precision Improvment (Standard)

Features:
Hall effect provids high precision performance to the printer, suitable for most heatbed materials, such as glasses, metals, etc.
Helps improve the quality of printing and bed adhesion. Adjusts all movement to follow the tilt or contours of the bed, giving enjoyable printing experince for you.
The 3DTouch auto leveling sensor is a device that uses the Hall effect to achieve leveling.
The position of the point can be obtained by touching the point on the heatbed, and then compensated by adjusting the z-axis height during printing.
Printing can also be achieved even though the platform is not flat.

Note:
The auto leveling sensor is not plug and play. Modification is required to your firmware and control board, and soldering work to the connector may needed as well.

Specifications:
Material: Electronic Material
Color: White
Voltage: 5V
Current: 15mA
Peak Current: 300mA
Cable Length: 200mm(short), 1000mm(long)
Wiring: 3pin: Green(-, GND), Red(+5V), Orange(signal); 2pin: Black(-, GND), White(Zmin)
Item Size: 3.6*2.6*13cm / 1.41*1.02*5.11in
Package Size: 14.5*9.5*1.5cm / 5.7*3.74*0.59in
Package Weight: 24g / 0.84oz

Packing List:
1 * Sensor
1 * Screw Pack
1 * Wire