Over 10,000 Units Sold on Amazon UHF BAND RECEIVER: 400-480mHz, analog and digital DISPLAY AND FUNCTION KEYS: Large easy to read backlit display with full adjustability with button locks prevents unwanted changes and channel presets to navigate with ease to your common channels you are listing too. RUNTIME: 4-5 hours (varies with volume setting) XTREME SPEAKER AMPLIFIER: Copy, loud and clear! Rugged's proprietary electronic speaker amplifier combined with the included stereo earbuds provide superior volume and voice clarity. FAST USB CHARGING: Ready to Race! Be race-ready at the track with the fast USB charging and long lasting Lithium-ion battery. Never buy batteries again! RACE CONTROL AUDIO PRIORITY: Stay in communication! The receiver mutes 2-way radio audio, giving Race Control audio priority so the driver never misses critical race communications (when used with CS-NITRO-ADPT-2). THE RUGGED RADIOS NITRO BEE XTREME UHF RACE RECEIVER. The Nitro Bee Xtreme is feature packed and simple to use, making it the perfect race receiver for dirt track, circle track, and road racing drivers, teams, and track officials. This powerful racing communication device will outperform your expectations with it's ease of use, loud clear sound, and one-of-a-kind features that will take your race to the next level! With one-way race receiver mandated at race tracks across the country, and being required by sanctioning bodies like IMSA, IMCA, Lucas Oil Late Model Dirt Series, USAC, ARCA, NASCAR, and more, the Nitro Bee Xtreme race receiver is the clear choice for clear, reliable racing communication.