2GIG DW20R-345 Recessed Door / Window Sensor, 345 MHz, 2.5", 5-Year Battery

Invisible, reliable perimeter protection for professional security and monitoring installations. The 2GIG DW20R-345 recessed door/window magnetic contact transmitter is engineered for concealed mounting inside door and window frames, delivering a discreet security solution that preserves facility aesthetics while protecting entry points. Operating on the proven 345 MHz wireless band, the DW20R-345 maintains strong communication with 2GIG control panels and legacy Honeywell 345 MHz systems. Installers benefit from a compact 2.5" transmitter design, a powerful rare-earth magnet with up to 0.625" gap sensitivity for precise open/close detection, and a long-life CR2 lithium battery rated up to 5 years under normal use—reducing maintenance cycles and service visits. Fully supervised communications report regular status, low-battery conditions and cover tampering, helping integrators and security managers maintain continuous monitoring and fast troubleshooting. ETL-listed to UL 639 burglary standards, this magnetic contact transmitter meets commercial requirements for performance and compliance. Ideal for new builds, retrofits, and high-end residential or commercial surveillance projects—add the DW20R-345 to your perimeter protection strategy today.

• Invisible perimeter protection: Recessed 2.5" transmitter installs inside door and window frames for a clean, tamper-resistant finish that preserves aesthetics and reduces vandalism.
• Reliable communications: 345 MHz wireless transmission delivers consistent connectivity with 2GIG control panels and legacy 345 MHz receivers for dependable monitoring and alarm signaling.
• Lower maintenance costs: Built-in CR2 lithium battery provides up to 5 years of typical operation to minimize service calls and downtime.
• Proactive system supervision: Periodic status checks plus battery and cover-tamper alerts keep security systems healthy and simplify maintenance for integrators.
• Precise intrusion detection: Rare-earth magnet and 0.625" gap sensitivity ensure accurate open/close sensing to reduce false alarms and improve event reliability.
• Professional compliance: ETL-listed to UL 639 burglary standards for commercial-grade installations and code-conscious projects.