Everything works as expected except one function but unfortunately the key one. There are no loud alarms when a car occurs. I see it on the screen but no sound. I had the item "tones" on in both 1030 system menu and sensor menu. I reset 510 and paired it again several times but no help. The firmware is the latest one in both devices (6.0 and 3.40). Is there anybody with the same devices with the loud alarm working ? What should I do ? The bad thing is that I bought the devices in two different shops so I can hardly ask one of them for repairing the system as a whole.