Wireless Doorbell Home Security Alarm / Welcome Smart Doorbell Three In Doorbell Features: The Product Can- Long- Distance- , Sound, Strong Penetrating Power, Good Home Furnishing The Product Has 58 Built-In Chord Music, Select The Music According To Hobbies Four-Level Volume Adjustment, The Sound Level Can Be Adjusted According To The Environment, Or It Can Be Adjusted To Mute Suitable For Many, Small Apartments, Office Buildings, Can Be Used As A Pager For The Elderly, A Little Helper To Get Up, Multi-Functional And Multi-Scene Design, Not Afraid Of Rainy Days Product Description: Product Parameters: Product Category: Smart Wireless Doorbell Product Model: W-101 Material: ABS Product Weight: 140g Music Selection: 58 Chord Music (4 Of Volume, Including Mute) Color Options: White Product Size: Transmitter Size: 3.1 x 7.2 x 2cm/1.22x2.83x0.78in Receiver Size: 6 x 9 x 6.8cm/2.36x3.54x2.67in Packing List: Doorbell Receiver x 1 Doorbell Transmitter x 1 Manual x 1