KY-036 Metal Touch Sensor

KY-036 Metal Touch Sensor
The KY-036 Touch Sensor Module utilizes a floating lead on a Darlington transistor to detect a touch. There are 2 LEDs on-board. A red LED lights when power is applied. A green or red LED lights when a touch is detected.
It’s a simple module that can be easily integrated into a circuit, it can be connected to an MCU (microcontroller unit) using just three pins: VCC, GND and Signal. The signal pin goes high when the sensor is touched and goes low when the touch is removed. It can be used in a variety of applications where touch sensing is required such as buttons, touchscreens, and other human-machine interfaces.
Package Includes:
1 x KY-036 Metal Touch Sensor Module
Specifications
Main Chip 
LM393
Working voltage(V)
5V
PCB Color
Red
Pin Connector to board
4 Pins 
Dimensions 
4.3 x 1.6 x 1.5cms 
Weight 
5 grams