Bests & Worsts Reviews from Amazon

Got mine today, and its going back. I have a greenhouse and needed a temp sensor with an audio alert in case the heat goes out in the night. Advertising said it has an alert, but after e-mailing the company, they said its ONLY a VISUAL alert, which is useless to me. Why would you have an alert on a smart phone that does not give you an audio sound? Set- up was very quick and easy, and I liked the software. The e-mail response from the company was very fast, and he said that they are "working on an audio alert", but that just does not work for me. I have a 15 year old Oregon Scientific unit that works great and wakes me up if the temps drops. Update 4/3/17: After several e-mails to the company (with extremely prompt and friendly service) the alerts are working correctly and I am the dumb one. Unit now sounds and works great, and could not have asked for better customer service.....