2 Pack Door and Window Sensors, 315/433 /868MHz/ Entry Sensors Compatible A103F A105F A107F A108F A109F A01F A02F A519W with Home Security Systems

• ​【POWER & ALERT】Powered by 3V DC​ for stable operation; built‑in low‑voltage alarm triggers at 2.3V​ to remind timely battery replacement and avoid unexpected downtime
• 【FREQUENCY】Supports 433MHz​ transmission for flexible use with remote controls, alarm systems, and IoT devices in home or commercial setups
• 【ENCODING】Equipped with EV1527​ encoding to help reduce signal interference and unauthorised access, suitable for security and access control applications
• 【RANGE】Reliable wireless performance with a transmission distance of at least 120 m​ in open space; ideal for large homes, gardens, or warehouses
• 【COMPACT & DURABLE】Magnetic strip 11×44×13.5 mm​ for easy mounting; transmitter 30×68×15 mm; storage humidity tolerance up to 95% RH​ for dependable use in humid environm
• 【Note】: This product requires use with an alarm kit and cannot be used independently. Any device on the market operating at the 315/433/868MHz frequencies compatible may be used.
• 【🛡Reliable Protection & Comprehensive Service】XNH possesses mature R&D and manufacturing expertise! Upon receiving your order, we provide a one-year quality warranty for your peace of mind. Should any queries arise, our expert support team is available for consultation, responding within 24 hours.

【POWER & ALERT】Powered by 3V DC for stable operation; built‑in low‑voltage alarm triggers at 2.3V to remind timely battery replacement and avoid unexpected downtime 【FREQUENCY】Supports 433MHz transmission for flexible use with remote controls, alarm systems, and IoT devices in home or commercial setups 【ENCODING】Equipped with EV1527 encoding to help reduce signal interference and unauthorised access, suitable for security and access control applications 【RANGE】Reliable wireless performance with a transmission distance of at least 120 m in open space; ideal for large homes, gardens, or warehouses 【COMPACT & DURABLE】Magnetic strip 11×44×13.5 mm for easy mounting; transmitter 30×68×15 mm; storage humidity tolerance up to 95% RH for dependable use in humid environm