Califone presentation systems offer installed or mobile, audio and visual amplification solutions for K-12 teachers, houses of worship, hotels, meeting facilities and equipment rental businesses. Versatile enough for classroom uses and addressing school assemblies, athletic events and larger groups our portable AV products will make sure messages are clearly communicated and heard with a range of power and features like built-in UHF receivers for two wireless hands-free presenters at the same time. Because best of all, a clearly audible, actively moving, close-up presenter holds students' attention more fully and for longer periods of time.