I had one on for a month when I forgot to pull over.
Anyways, they charged me about $400 to setup it up. They installed a router like device on my phone line that synced with the ankle bracelet. The bracelet had a rubber strap with wires embedded into it connecting to a plastic box roughly the size of a pack of cards. They left about a 1/4 inch of slack to allow circulation. I could shower with it, stuff my socks under it etc. I put lotion on my ankle the first week but it never caused chaffing.
There is NO alarm or buzzer or anything like that when you step out of bounds on the system they had me on. The router just calls and lets the police/contractor or whomever know that the bracelet is no longer repeating the signal from the router. I was informed I could go anywhere in the house but shouldn't go father than 10 ft outside of it to stay on the safe side. Regardless of the range I was not permitted to leave my property expect when I had to go to work, in which case I had to fill out this form that had the time when I would leave, and when I would arrive home with no stops in between.
If I remember correctly they said when they get an alert, they will try to call you within 2 minutes. If I dont answer they send the police to check. If I wasnt there I'm sure some repercussion would follow. I didn't have a problem with it, just spent allot of time playing Mario Cart.