Features: This product is a wireless switch supports inching /self-locking mode. Users can add the device to the APP Smart life in order to remotely control connected or devices. In self-locking mode, customers can remotely turn on/off connected devices immediately. When in inching mode, customers can have two wiring ways to select, and you can set the inching time in APP . 4G control model, no need to program. No matter where you are, you only need to download a APP to connect the 4G and control the cloud. Note: 1. This 4G switch does not include a 4G SIM card. You need to bring your own 4G SIM card. 2. According to customer feedback, it supports most European SIM cards and SIM cards in Russia. It is not 100% certain whether SIM cards in other regions can be used. Parameters: Input voltage:DC 7V~32V/USB5V Max.current:10A Wireless:4G-LTE Working temperature:-20~70C Working Humidity:80% Color: White Material: ABS There are differences in printing and silk-screen printing due to different batches, which not affect the use; there are color differences in the actual product due to different light or display. 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.