‎Satisure Wireless Door Open Contact Sensor Alarm Chime

OVERVIEW: A GREAT GIFT for homeowners, people who live alone, the hearing impaired, anywhere you need a safe guard Easy Installation - The door chime and door sensor are already paired. The first step is to stick the sensor on the door/window (the distance between the two parts should not exceed 0.4 inches), and the second step is to plug the chime receiver into the socket. Installation is completed! Upgraded Battery - Using household alkaline batteries, designed with ultra-low power design, our door sensor chime allows the battery to last up to 7200 times 600ft Wireless Range and Expandable Pairing - All the Satisure brand's door entry chime and sensor alarm can be paired with each other, and one receiver/sensor can pair up to 58 sensors/receivers. With a wireless range of 600ft, it meets the needs of long-distance and multiple pairings for home, businesses, and stores 58 Optional Ringtones and 5 Volume Levels - 58 rich and varied ringtones, there is always one that meets your expectations! 5 volume levels from 0-110DB, you can choose silence or loud sound, to meet your needs in daily life! The LED indicator is suitable for the elderly and those with hearing impairments