Wireless Remote Control For W1 W2 W18 G18 G19 Home Security Alarm Systems. Introducing the KERUI Wireless Portable Remote Control for GSM PSTN Home Security Alarm Systems. Designed for Seamless Integration with Models Such As W1, W2, W17, W18, W19, G18, G19, G183, G193, 8218G, and 8219G, This Remote Ensures Enhanced Security Control at Your Fingertips. Engineered with Superior Quality and Widened Keys to Prevent Misuse, This Remote Features an Optimized Circuit Design for Improved Signal Intensity. Operating on a Frequency of 433MHz and Powered by 3V Button Batteries (included), It Boasts Reliable Transmission Tested Up to 100,000 Times. Key Features: - Compatibility: Works with Various GSM PSTN Alarm Systems - Design: Super Quality Widened Keys to Prevent Misuse - Performance: Optimized Circuit for Enhanced Signal Strength - Durability: Laboratory Tested Buttons for Up to 100,000 Uses - Frequency: 433MHz Operational Frequency - Range: 80m Transmission Distance (without Obstacles) - Environment: Works in Temperatures from -10°C to 40°C, and Humidity Up to 90% - Power: Includes Two 3V Button Batteries Package Includes Three Wireless Remote Controls with Batteries Installed, Ready to Enhance Your Home Security System Effortlessly..