Califone PA10B-1 PA Pro Wireless Public Address Systems with Storage/Carry Case; 210.250 MHz Frequency; Built-in carrying Handle for Playground Use, Meetings or Tours; Rugged ABS Plastic Casing 100 wireless range from transmitter to PA, Separate tone and volume controls 6 hour battery use with low battery indicator and unit still operates while recharging its built-in battery Hands-free wireless mic and belt-pack transmitterm Lightweight transmitter comfortably worn on waist Internal storage space so transmitter, charger, & mic wont get lost 3.5mm mic jack for use with a wired microphone