Hear and leave a message The U is a very affordable 500 channel handheld scanner with a variety of features in a convenient compact design.Listen to over 32,000 frequencies: Start listening to the most popular searches right away with convenient presets. Frequency presets in 10 service banks, non-digital police/fire/emergency, NOAA weather reports, marine, racing, commercial aircraft, ham radio, railroad, CB radio and others. This makes it easy to find channels of interest.PC programming lets you program the scanner using a PC. Short-range invocation RF capture technology instantly tunes to signals from nearby transmitters, and Priority Scan scans the channels you designate as priority channels. If the scanner loses power, the memory backup can extend the frequency stored in memory.The delay feature helps prevent missed replies during two-way conversations. Other features include keyboard input, headphone jack, key lock, low battery alert, power saving. Triple conversion design ensures excellent performance.Three power options: 1 - The included USB cable will power your SR30C from your computer or other USB power source such as a smartphone USB charger (not included). 2 - Two AA alkaline batteries (not included). 3 - Two AA rechargeable NiMH batteries (not included). You can also charge rechargeable NiMH batteries with a USB cable.Excellent entry-level portable scanner This scanner is not suitable for receiving digital communications (eg Item 25, DMR, NXDN). Some police/fire/emergency/public safety agencies in large cities are transitioning to digital relay communication systems.