AVerMedia AW330 Wireless Classroom Audio System

AVerMedia AW330 Wireless Classroom Audio System Color: Black Speaker Type: Speaker System Specification: Operating range: 15-20 m / 50-65 ft Wireless frequency: 2.4 GHz Operating temperature: 0-35°C / 32-95°F Microphone: Battery life: about 8 hours Power supply: 5V / 2A Speaker: Power supply: 9V / 2A Wireless Technology: 2.4 GHz Operating Range: 15-20 m / 50-65 ft Speaker Configuration: 20W RMS Battery: Microphone: Battery: 350 mAh lithium-ion polymer Speaker: Battery: 2600 mAh lithium-ion polymer Dimensions: Microphone: 1.18' x 3.15' x 0.98' Speaker: 2.76' x 3.54' x 8.35'