Shure PG288/PG58 Dual Vocal Wireless System This innovative system gives you two independent systems in one convenient package each side offering ten operating frequencies! Performance Gear Wireless Systems are engineered to the same uncompromising quality standards as PGX SLX ULX and UHF-R wireless. Marrying superior sound quality and stage-proven endurance with advanced features like Internal Antenna Diversity and electable frequencies and variable companding Performance Gear Wireless fulfils the promise of independent confident performance through freedom from the wire. Available in three frequency ranges (we can select the proper range for your area) the PG line offers 10 frequency operation -- almost unheard-of in an entry level UHF system! This means that should you get interference on the channel you are using (either now or in the future) you can simply set the system to another frequency. This dual channel system features the PG58 cardioid dynamic handheld transmitter; a cardioid dynamic mic with a smooth frequency response tailored to vocals. If you're thinking about going wireless get Shure quality for less with Performance Gear! Make sure you're not caught without extra batteries! Frequency Range: 536 - 674 MHz across three bands Operating Range: up to 250 ft. Dynamic Range: >100 dB A-weighted typical Battery: 9v >8 hours (alkaline) Audio Frequency Response: 45 Hz. Maximum: 15 kHz