Features<br> 1. Excellent Working Range: Our wireless door chime working range up to to 500 ft. Far enough to cover every door and window in your house.<br> 2. 50 Music with 4 Volume Levels: Our door entry alert has 4 levels of adjustable volume. 50 unique chimes allow your wireless door and window entry alert system to meet any need.<br> 3. Easy Installation: Plug the receiver into any standard outlet. Tear the double-sided tape and stick the sensors to the door or window. The receiver will alert immediately when the sensors separated.<br> 4. Reminder Function: If your door or window is left open. The receiver will ring every 5 minutes, auto-silence after 5 times. You can turn off this function if you don't need it.<br> 5. Expandable Wireless Door Chime: You can add more receivers and sensors in multiple areas. Each wireless doorbell receiver can pair up to 50 sensors and each sensor can add unlimited receivers.<br> Specification<br> Material: Plastic<br> Color: White<br> Size: 8 x 8 cm<br> Weight: 80 g<br> Plug Type: US, UK, EU<br> Package Include:<br> 1x Wireless Door Chime<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin