Welcome to the store! This emergency call button system includes a wireless button, host (not included), and audible/visual alarm (not included). In an emergency, pressing the button sends a signal to the host, which then triggers the alarm to emit a loud alert. Highly reliable and powerful, with a compact design for easy portability and storage. Waterproof, pressure-resistant, anti-collision, and equipped with automatic control for enhanced safety and security. Widely used for door and window control, industrial control, burglar alarms, smart homes, and more. Versatile applications include restrooms, schools, hospitals, nursing homes, parks, and shopping centers. Item Type: Emergency Call Button Material: ABS Power Supply: CR2032 button battery x 1 (battery included) Working Voltage: 12V Working Current: ≤12mA Working Frequency: 433MHz Transmitting Power: 10-15MW Launch Distance: Approx. 100m/109yd (open area) Frequency Deviation: ±0.2MHz Transmission Rate: 50-60KHZ Includes: 1 x Emergency Call Button Your 100% satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues upon receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!