Maxon TSD-4424 UHF (410-470 MHz)Maxon TSD 4424 TSD 4000 Series Digital Analog Display Two Way Radio The TSD 4000 Series of Digital + Analog Display Radios are the best radio for any day to day application. The series provides the user with a powerful 5W performance in an attractive, compact size. Its ability to work on both Digital and Analog systems make this feature rich radio perfect for schools, hotels, restaurants, security companies, custodial services, and industrial use