Hi,my dear angel, welcome to Jacenvly, our products are cheap and good quality, price is fair, you can't miss it. If this product is not your style, please click on our store, we have many kinds of products, there will be you like and suits you. If you have any questions about your purchase, please send us the first message, we offer world class customer service to make your purchase without your worries. Have a nice day. Wireless Doorbell Household Electronic Remote Control Digital Dingdong Doorbell Children And Elderly Wireless Pager Features: Strong signal: The signal can penetrate 3-4 walls, and the signal propagation distance can 300 meters in the open . Ideal for large units, including villas, apartments, offices, shopping malls, warehouses, etc., and is rainproof. Various ringtone music: 60 of music can be switched, and you can choose different music from adjacent doorbells without making a call. The doorbell has five volume options, so you can hear it whether you're on your balcony, kitchen or bedroom. The volume can be adjusted according to your usage needs, and you can choose the volume that suits you. Optional combination of host buttons: The host can be equipped with multiple buttons, and different ringtones can be set for different buttons to distinguish the front and rear doors. Add multiple hosts with one click, and there are dual speakers in the living room and bedroom, so you don’t have to worry about not being able to hear their voices. Multiple uses: In addition to being used as a doorbell, it can also be used as a pager. When the elderly, infants, and pregnant women need to sleep alone, one-click notification is provided, and the night light can be turned on, bringing convenience to you in the dark. Easy to install: This product is small and compact, with a receiver that fits into a household outlet. It also comes with a free installation tool and user manual, and you can follow the instructions to install it. Product Description: 1x Wireless Doorbell 1x Manual Product name: Smart video doorbell Material: ABS Product color: black, white Working voltage: 110V-240V Power consumption: 0.5W Transmitter battery model: 23A 12v Features: Strong signal: The signal can penetrate 3-4 walls, and the signal propagation distance can 300 meters in the open . Ideal for large units, including villas, apartments, offices, shopping malls, warehouses, etc., and is rainproof. Various ringtone music: 60 of music can be switched, and you can choose different music from adjacent doorbells without making a call. The doorbell has five volume options, so you can hear it whether you're on your balcony, kitchen or bedroom. The volume can be adjusted according to your usage needs, and you can choose the volume that suits you. Optional combination of host buttons: The host can be equipped with multiple buttons, and different ringtones can be set for different buttons to distinguish the front and rear doors. Add multiple hosts with one click, and there are dual speakers in the living room and bedroom, so you don’t have to worry about not being able to hear their voices. Multiple uses: In addition to being used as a doorbell, it can also be used as a pager. When the elderly, infants, and pregnant women need to sleep alone, one-click notification is provided, and the night light can be turned on, bringing convenience to you in the dark.