The 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.

Features:

1. Main chip: LM393
2. Working voltage: for DC 5V
3. Single-channel signal output
4. Low-level output signal used for human body touch sensor alarm
5. Adjustable sensitivity
6. Pin Connector to board: 4 Pins

Package Includes:

1 x Touch Sensor Module