Secrui wireless door open chime is priced affordably to protect every entryway in your home.
With its simple peel and stick installation, compact design and loud alarm, the Mini door entry
alarm with chime is an effective solution to home security.
  Magnetically triggered alarm to guard your entry ways
  Simple peel and stick installation
  Select alarm or chime
  Loud 100dB alarm
  Alarm/chime sounds when the protected door or window is opened
  1x 23A 12V alkaline battery (included)
 
  Parameters of Doorbell Receiver:
  52 tones optional
  Colorful LED indicator
  Standby current :

Product Features

• 【Wide Working Range】:This wireless door open chime for home is up to 400 ft in open area, magnetic door sensor will automatically trigger the receiver when the magnetic strip is separated and the receiver will alerts immediately whenever the door or window is opened
• 【24/7 Lifeguard for Your Family】: This child/ home door sensor alerts when burglar opens door and helps deter break-ins(entry alert chime activates when magnetic sensor separates)
• 【Mini Contact Sensor】: Door Alarm Sensor (Size:3.0×1.0x0.60ininch),magnetic strip (Size:1.7*0.6*0.4 inch).They are small size and can be installed or placed at any indoor position to provide you with a door entry chime/alert system.
• 【52 Music with Mute to Loud dB】:5 levels of adjustable volume from 0-110 dB.Offer 52 elegant music from the traditional”Ding Dong” to various well know chimes.Memory function: Keep the previous setted tune after re-plugging it
• 【Easy to install】:Just plug the doorbell receiver into any standard outlet and tear the double- sided adhesive tape which on the back of door sensor( or screw mounted) and stick them to the door or window is fine,please take the insulating paper away before using the sensor.