The portability and versatility of a wireless PA system are built into the PA Pro, Powerful enough to handle indoor and outdoor uses it is perfect for school yards tour groups meetings and can be a potential lifesaver in emergencies where crowd control and communication can make the critical difference, For lecture halls indoor - outdoor activities meetings conferences field trips and tour groups up to 150 people, Wireless delivery is practical during emergency situations, Convenient transmitter and mic storage space inside 10 Watt amplifier prevents accidental loss, Internal rechargeable battery for savings, 210, 250 MHz frequency, Carry Case SKU: CAFI215