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. Smart Wireless Doorbell Kit With Solar Powered Button And Plug-In Chime For Household,4-Level Volume Features: Unique and elegant style Power saving and durability with solar power transmitter Receiver plug, European / American / British model optional Range in open space: max. 200-300m 2 tunes of different styles,4-level Adjust volume, including mute mode Free pairing: transmitter can be matched with several receivers. receiver can also be matched with several transmitters Package size: 4.09x3.78x3.03 inch,Gross weight:0.4 lb Doorbell parameters: Solar cell: 150mah polymer lithium battery Maximum power of emitter solar panel: 5.5V 25mA 0.13w Working current: 12mA reminder: press the button for 0.5 seconds Working range: about 200-300m (open area) grade of transmitter: IP65 Dingdong machine parameters: Working voltage: 90-260v Standby current: 10mA Working current: 60 Working frequency: 433MHz Power: ≤ 2W Music: 52 Adjust volume: 20-80db (4-gear cycle adjustment) The Package Include: 1 x Doorbell 1 x Ding dong machine 1 x Use manual 1 x Installation tool Features: Unique and elegant style Power saving and durability with solar power transmitter Receiver plug, European / American / British model optional Range in open space: max. 200-300m