The module is based on a touch-sensing IC TTP223 capacitive touch switch module. Trigger setting mode:(1- Greater than Short;0- Greater than No Short) Power supply: 2.5v-5.5v/2W Use effect: AB = 00: no lock high TTL level output; AB = 01: self-locking high TTL level output; AB = 10: no lock low TTL level output; AB = 11: self-locking low TTL level output Touch key switch module stable touching detection of human body for replacing traditional direct switch key. A very useful addition for projects or applications where a conventional mechanical button or switch is not a perfect choice. The touch button capacitive switches module can be installed in plastic, glass surface non-metallic materials. As long as the touch of the correct position, you can make hidden in the wall, desk and other places. color:Red Material:PCB size:15 x 11mm Package Contents: 100 x Capacitive touch switch button self-Lock module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!