Wireless Magnetic Door Sensor, Mini Window Sensor, Operating Range 600FT (2 Sensors) - No Receiver

Key features

• Perfect solution for expanding your Doorbell System with this additional door sensor transmitter. Compatible with 433 MHz Wireless Entry Alert Doorbell
• Wide Cover Range & Expandable: Cover range up to 600ft in open area, pairing up to 20 receivers to one door sensor, or 20 door sensors to one receiver.
• VERSATILE USE: Flexible compatibility with windows, doors, cabinets, patio doors, drawers and more. Indoor use only.
• Mini Size: They are small size and can be installed or placed at any in door position. Please take the insulating papers away before using the sensors.
• QUALITY GUARATEE: We provides 1 year warranty,and AFTER-SALES SERVICE within 24 hours. Any quality problem,please contact us directly.