We are a school and we wanted to purchase several of these alarms. We reached out to the company and purchased 20 alarms at a discount price of $20 each. Paid the total of $1,000. Our credit card was charged the amount, however after a month, we were charged the same amount and the month after that and so on. We thought it was for the original purchase, but the charges keep coming month after month. They don't answer the phone and have taken away over $3000 from our school. It's a scam and shady business.