The RSDUALP Dual Power Smoke Alarm combines 240V mains power with a 3V battery that lasts for 10 years, ensuring reliable performance and extended coverage. It features a 140mm slide base for easy installation and supports both hardwired and RF module interconnection for versatile setup options. Additionally, it includes a dual mesh insect guard to assist in the prevention of false alarms caused by insects. This provides enhanced protection and peace of mind.