Wireless Door Chime, BITIWEND Door Alarm Sensor Door Open Window Alarm with 58 Chimes 5 Volume Level 600ft Range LED Indicator for Office/Home/Store When Entering 2 Door Sensors+2 Plug-in Receiver

👍【Master Each Area You Care】600ft(150m) far enough to cover every door and window in your house, door chime signal can easily cross through doors or walls,even if you are a few rooms away or on another floor. Note: The battery level will affect the signal receiving range. It is recommended to change it once every 8 months.e a few rooms away or on another floor. Note: The battery level will affect the signal receiving range. It is recommended to change it once every 8 months. 🔔 【58 Melodies & 5 Volume】Wireless door chime features 58 chimes and 5 levels adjustable volume(0 dB to 110 dB) to meet your needs for different occasions. Remembers your last melody and volume level after a power outage; no need to reset to your previous settings. 🔔【Expandable】Each wireless doorbell receiver can pair up to 20 magnetic door alarm sensors and each sensor can add unlimited receivers. You can use them with additional BITIWEND door sensors or doorbells. Install them in your dining room, bedroom, living room, garage, yard, or your store and office. 🌐【Up to 600 FT Working Rang】 Wireless door sensor chime with working rang up to 600ft in open area to cover your house or store, ensures you will never miss a visitor. Note: The battery level will affect the signal receiving range. It is recommended to change it once every 12 months. 🔔【Easy to Install to Use】 Just plug the doorbell receiver into any standard outlet and tear the double-sided adhesive tape on the back of door sensor(or screw mounted) to stick to the door or window, please take the insulating paper away before using the sensor.