My experience with my guardian is grate
Excellent, simple to install, cost effective, and durable.
Super easy to setup, hardest part was picking the ringtone we wanted. Follow directions and had both done within 10 minutes.
Works supper. Good loud alarm.
Everything thing works great. The only complaint I have is with UPS it took 14 days for delivery. According to tracking my package was only 10 miles from my house in 4 days then 4 days later it was 600 miles away. You should get a refund from UPS. Of course I was billed right away and it was 14 days later before I got my product.