The Rocky Mountain Radar RMR should be sold as a radar detector only and not as a scrambler. The radar detector in this unit works fine but its scrambling effectiveness is almost nil. It has an effective range of 10-15 feet; only 10-15 feet. I have purchased several Rocky Mountain Radar scramblers and all have excellent detectors but are not useful to drivers as radar or laser scramblers. They just don't have the capability of scrambling signals from radar or laser guns in time enough to prevent a driver from getting a ticket and having to pay fines. As stated earlier, Rocky Mountain Radar scramblers have an effective range of only ten (10) to fifteen (15) feet!