Feature: 1. Multi‑function, one doorbell can be used with multiple B30/M6/M3 wifi doorbell, easy to use. 2. With different volume and different ringtones, you can adjust freely, bringing you a better experience. 3. Low power consumption, bring you convenience, safe use , a good household supply. 4. Modern fashion, beautiful and delicate, can be well integrated with your home decoration style. 5. A good gift for a friend who loves household decoration, it is a great home decor. Specification: Condition: 100% Brand New Item Type: Doorbell Material: ABS Color: Black Size: Approx. 83x83mm / 3.3x3.3in Weight: Approx.90g/3.2oz . Package List: 1 x Doorbell Note: 1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.