Versatility in a handheld wireless microphone is as important as its ability to deliver clear, crisp audio, The Califone Q319 is designed to work with the entire UHF line of wireless Califone PA systems including: PowerPro SD (PA919SD), PowerPro (PA919), PowerPro Companion Speaker (PA919PS), PresentationPro (PA319), and Wireless Array (PI39) speakers, This economical mic eliminates the need for dedicated microphones to any given speaker and allows for mix-and-match uses, extends budgets, and provides system-wide flexibility, LCD display screen for 16 selectable channels for optimal sound choice and clarity, Channel up/down buttons, On/Off power switch, Up to 150" wireless transmission range to speaker, SKU: CAFI327