This exit button is no-touch infrared exit button with tuya smart APP. It's verystable and sensitive,with automatic adaptability to ambient temperature andhumidity,do not affect by the weather or temperature. Output the NO or NCsignal when recognize the gesture . The indicator light is red when it's instandby, and the indicator light is green when the signal is recognized. Graffiti switch flexible:fast installation,Applicable to access control Automatic door,Wireless WlFl connectioncontactless infrared sensing,remote control of mobile phones Working voltage:DC9-DC12V Environmental humidity:20%-80% Working current:Less than 600mA Working temperature:-30-60 Specifications: B:OP12-wifi Colour:As Shown Material:Aluminum Alloy Package Contents: 1 x Smart Switch 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.