GRE PSR500 Digital APCO-25 Triple-Trunking Handheld Scanner Intuitive "Object Oriented" User Interface: Designed for ease of use, yet powerful enough for experts. Common data entry, browsing and control methods are used for non-trunked conventional channels, trunking talkgroups, and Spectrum Sweeper setups. Powerful and Flexible Scan List Functionality: Allows you to arrange, group and scan objects according to your preference, with no limit to the number or types of objects in a Scan List, no limit to the number of Scan Lists an object can be a member of. Menu Driven Programming with Context Sensitive Help - Each menu item provides a few lines of help text that provide assistance with programming and using the scanner. Upgradeable CPU and DSP Firmware - You can easily keep your radio current with software enhancements as they become available with free upgrades from our website! Remote Control Capability - Can be used with third party application software to remotely control the scanner from a personal computer.