PAVEOS Wireless Doorbell Home Security Alarm / Welcome Smart Doorbell Three In Multi-function Door Button 433MHz Easy To Install Features: 1. The Product Can, Sound, Strong Penetrating Power, Good Home Furnishing 2. The Product Has 58 Built-In Chord Music, Select The Music According To Hobbies 3. Four- Volume Adjustment, The Sound Can Be Adjusted According To The Environment, Or It Can Be Adjusted To Mute 4. 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 5. Design, Afraid Of Rainy Days Product Parameters: Product Category: Smart Wireless Doorbell Product Model:D-638 Material: ABS Product Weight: 180g Music Selection: 58 Chord Music (4 Of Volume, Including Mute) Color Options: White,black Product Size: Transmitter Size: 3.4 x 7.9x 2cm/1.22x3.1x0.78in Receiver Size:8.6x7.9cm3.4x3.1in Packing List: Doorbell Receiver x 1 Doorbell Transmitter x 1 Manual x 1 Househeld supplies for adult and children Design: Our smart household appliances adopts a close-to-life design, just to achieve a satisfying experience for you. Durability: This smart household appliances is made of sturdy and durable materials, which can maintain its functionality even after frequent use. Multipurpose: This smart household appliances can provide convenience for your daily life, whether it is for daily work or home leisure, you can also give it to your husband/wife/family, they will love it! Wide Selection: Discover an extensive range of household tools, from indoor to outdoor accessories, ensuring you find exactly what you need for your home . This smart household appliances will surely fulfill your needs! Service: If you encounter problems in the process of using smart household appliances, please feel free to contact us and we will solve them for you.