7 FLASHING COLORS: Features 7 vibrant flashing colors that can be adjusted to your preference, adding a decorative touch to your doorbell.<br> MUSIC SELECTION: Choose from multiple built-in musical options to create a welcoming atmosphere in your home.<br> WIRELESS DESIGN: Enjoy a hassle-free setup with the wireless design, offering convenience and quick installation without complicated wiring.<br> SUITABLE FOR ELDERLY & HEARING IMPAIRED: The loud volume and flashing lights ensure that the elderly and hearing impaired can easily notice the doorbell.<br> PRACTICALITY: In addition to being a doorbell, it can also be used as a pager for young and old with special needs, allowing them to call family members or caregivers with the push of a button.<br> Dry batteries not included.<br> Working Voltage: DC4.5V (3 batteries)<br> Working Current: less than 200mA<br> Encoding Method: power.<br> Music: 16 songs<br> Volume: 0dB~85dB (3 levels adjustable)<br> Receiving Distance: more than 100M<br> Size: Transmitter: 8*5*2.2cm/Receiver: 10.2*6.7*3.0cm