This wireless call system is an intelligent SOS emergency call system that can be controlled with the Tuya app. It connects to your smartphone and supports 2.4 GHz Wi-Fi. When the button on the device is pressed, it sends a signal to the paired smartphone. The button is large, making it suitable for seniors and people with disabilities. Thanks to its compact size of just 5.5 x 5.5 cm and a weight of 40 g, it can be easily carried in a pocket, worn around the neck, or mounted on a wall. Additionally, it is waterproof. The device is powered by a built-in Li-Ion battery that can be charged via cable. Color: white/red.