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 【 YaChu welcomes you ! 】- We provide quality services, affordable prices, and the best products. This is our image in Wal Mart. You will definitely meet our products in Wal Mart. 【 Sell only 100 products that happen to meet your needs ! 】- You can search for: ‘ YaChu + *** ’ . 【 Low Prices and Discounts 】- You may be waiting for long holiday discounts, but you can also keep an eye on our products or add them to your shopping cart for irregular low price promotions! 【 Service 】Item delivery within 7-12 days.If any problem with shipping or service, please contact us and we will reply to you within 24 hours. NOTE: Please allow 0.4-0.8 inch (1-2 cm) differ due to manual measurement.If you are not sure the size, please send message to us.