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Description: - Metal Touch Interface module and number 13 with LED build a simple circuit to produce a touch cue lights . - Use number 13 interface LED, make metal touch sensor connect digital three interfaces. when a metal touch sensor senses a key signal, LED lights, otherwise off. - Working voltage: for DC 5V - Single channel signal output. - Low level output signal used for human body touch sensor alarm - Adjustable sensitivity. - With fixed hole for easy installation. Specification: - Size: 42 x 15mm/1.6 x 0.6inch Package Includes: 1 Piece KY-036 Human Body Touch Sensor Module