Feature: 1. Requires wireless remote control, the host (not include host) and sound and light alarm (not include sound and light alarm) are used together. When someone has an emergency, press the button. 2. The wireless button sends a signal to the host(not include host), the host sends a sound and light alarm signal to the alarm, and the alarm (not include sound and light alarm) sends out a high‑pitched alarm. 3. Widely used in motorcycles, automobile anti-theft products, home anti-theft products, short- and long-distance wireless remote control products, industrial control products. 4. Wireless remote control has the advantages of long transmission distance and strong wall penetration ability. 5. Working voltage is 9V, working current is 60mA, working frequency is 433MHz. Launching distance is approx. 3000m/3280.8yd(Open space). Specification: Item Type: Remote Control Switch Material: ABS Working Voltage: 9V Working Current: 60mA Working Frequency: 433MHz Transmission Power: >0.5W Launching Distance: Approx. 3000m/3280.8yd(Open space) Frequency Deviation: ± 75kB Encoding Chip: Pt2262 Shock Resistance: 4.7M Number of Keys: 2 Buttons Modulation Mode: ASK Static Current: 0uA Power Supply: 9V 1604E (Battery Included). Package List: 1 x Remote Control Switch