SR-720B PG2 is the ideal indoor siren for residential and light commercial buildings, where PowerMaster systems are installed. This cost effective, two-way wireless siren produces all alerts, with differentiated alarm sounds for intrusion and fire. The extremely strong siren sound and built-in high-power white strobe light ensure the alarm gets noticed. Based on Visonic's ground-breaking PowerG technology, the SR-720B PG2 combines several field-proven advanced technologies and the highly reliable AES Encryption Method. The combination of these technologies delivers extended transmission range and battery life, and unmatched advantages for professional installers, central monitoring stations and end-users alike. The siren's two-way communication maintains continual supervised communication with the control panel. SR-720B PG2 is perfect for use in homes and apartments, vacant vacation homes and in small stores. Featuring an elegant, thin-profile design, it fits unobtrusively in any décor. The easy, cable-free installation guarantees time- and cost-efficient implementation and servicing.