433mhz Wireless Indoor Siren With Strobe Light - 110db Alarm System. Introducing the PGST 433MHz Indoor Wireless Siren with Strobe Light, Designed to Boost the Security of Your Home or Office. This Wireless Spot Alarm System Delivers a Powerful 110dB Sound, Effectively Deterring Intruders and Alerting Occupants. It Operates Within a Radio Frequency of 433MHz, Offering a Wireless Transmitting Distance of 100-150 Meters in Open Areas. The Siren Functions Effectively Within a Wide Temperature Range of -20℃ to +55℃, and a Working Humidity of 40% to 80%RH, Ensuring Reliable Performance in Various Environments. Equipped with a Backup 7.4V/400mA Lithium-ion Battery, the Device Maintains Functionality Even During Power Outages. Its Sound Volume Ranges from 100-110dB, Making It Highly Effective for Security Applications. The Power Output is DC 5V/1A, and the Device Maintains a Low Standby Current of ≤13mA and an Alarm Current of ≤230mA, Ensuring Energy-efficient Operation. The Product Operates Without Concern for Harmful Chemicals, Emphasizing User Safety. Features: - Brand: PGST - Model: PE-519, PE-519R - Wireless Frequency: 433MHz - Sound Volume: 100-110dB - Wireless Transmitting Distance: 100-150m (in Open Areas) - Backup Battery: AAA 7.4V/400mA Lithium-ion - Power Output: DC 5V/1A - Standby Current: ≤13mA - Alarm Current: ≤230mA - Operating Temperature: -20℃ ~ +55℃ - Operating Humidity: 40% ~ 80%RH.