The REMTronix REM-843B BNC PORTABLE TRIBAND ANTENNA is a multi-band antenna designed to provide optimal performance across 136-174 MHz, 420-470MHz, and 800-900MHz frequencies. It offers vertical polarization with an omnidirectional antenna pattern and 5-inch length. Compatible with Uniden and Whistler receivers, this antenna has a BNC connector and comes in a rubberized casing.