Not compatible with the It wifi doorbell. Returning chime to seller and requested refund. Gave one star as I coudn't post review without it .Returning process has been extremely difficult without a printer, it has been impossible to return via Post Office. A simple return address would have sufficed instead of this useless process. I am now stuck with a chime that is of no use to me plus I'm £16.00 out of pocket! Would not recommend.