1000Ft Working Range: Wireless magnetic door and window alarm monitor every areas that you care. This wireless door chime for home is up to 300M/1000 ft in open area, magnetic door sensor will automatically trigger the receiver when the magnetic strip is separated and the receiver will alert immediately whenever the door or window is opened Kind Reminder: If the pairing between the transmitter and receiver is accidentally cleared (e.g., by long-pressing the volume button), the chime may stop ringing. To re-pair the devices: a. Press and hold the "Next Chime" button on the receiver for over 3 seconds. You will hear a "ding dong" sound, indicating the receiver is in pairing mode. b. Separate the magnetic sensor parts (move the door sensor magnet away). The chime receiver will play the default chime sound, confirming that the pairing is successfully completed Lifeguard for Your Family: This home security door alarm sensor chime when burglar opens door and helps deter break-ins when the door and window opening. Colorful RGB Indicator reminders of the wireless door entry alert to help people with poor hearing find guests and thieves coming. Door open alert is perfect for elderly and kid use, it will notice you when they get out or come back home.The lifespan of the door sensor can up to 3 years Loud Door Alarm Sound: This shop door entry chime has 61 tunes and 5 levels of adjustable volume from 0-120 dB. Just press the volume key to set the volume level you want.Humanized Mute mode-0dB won't disturb a sleeping baby.Door alarm sensor chime has memory function remembers your last melody and volume level after a power outage, no need to reset to your previous setting Wide Compatibility: The wireless and portable design of the door sensor alarm allows you to install the wireless door chime anywhere in your home, office, retail store, garage, front door, back door, garden. Each magnetic door and window sensor receiver can pair up to 20 door alarm sensors. Door alarm sensors is powered by four long-lasting LR44 batteries (included), (included), which can be used for up to 3 years Easy to Install: Just plug the door and window sensor receiver into any standard outlet and place the magnetic part on the door or window with double-sided tape and ensure the switch is in the on position of the magnetic sensor What You Get: 36-month support (Registered only), 1x TECKNET Door alarm sensor chime, 1xTECKNET Magnetic Door Sensor,1x User Manual and Double-Sided Adhesive Tape, Manufacturer: TECKNET