Features Simple Programming: Simply enter your zip code or city, and HomePatrol-1 selects the channels in use in your area TrunkTracker IV (Motorola® APCO 25 Digital, Motorola®, EDACS, LTR): Lets you monitor all of the major types of communications systems used by public safety, local government, amateur radio operators, and more S.A.M.E. Emergency/Weather Alert: Allows you to specify the area for which you need to hear any alerts, including Weather, Civil, Biological, Nuclear, or National Covers US and Canada: Built-in database includes all known channels in use in the United States and Canada (All services not available in some areas) Quick Record and Playback: Lets you record sessions for later playback or archiving Instant Replay: Lets you replay the most recent reception with a single tap 3.5" daylight-viewable display Free Radio System Updates: Radio system database is updated weekly No subscription needed Touchscreen Operation - Makes it easy to control what you are hearing HomePatrol Sentinel PC Software Included: Lets you update the HomePatrol-1's database, update firmware, and more easily manage favorites lists and other settings Rechargeable power source (AC and DC adapters sold separately) Headset compatible 1-year manufacturer's warranty Dimensions: W 6" x H 3" x D 1" Weight: 3 lbs