For indoor and outdoor uses, such as in auditoriums, lounges at airports, and halls. Use under the eaves of a roof if weather-resistant. Speaker dust protection with a foam layer. For greater audience coverage, a speaker array emits a sound beam in the forward direction. Hardware and mounting clamps are provided. Grey-painted aluminum cabinet with column speakers. Speaker connections are made at the back via a terminal strip. a line-matching transformer of 100V.