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Product Name: The touch sensor touch alarm FOR arduino!

Dimensions:  45mmX18mmX 5mm
The main components: operational amplifier, the triode
Operating voltage: DC 3-5V
Features:
1, with the output TTL level signal indication.
2, can be connected directly to the microcontroller IO port.
3, anti-interference ability
4, connect the microcontroller to achieve a touch switch functions
5, a relay module can be controlled separately
6, long life, can work
7, the standard 2.54mm pin do input and output connections.
8, surrounded by a fixed mounting holes.