The UBL 100-Watt Slim Speaker is the perfect mix of reliability and affordability. Constructed with a durable aluminum frame, the UBL 100-Watt Speaker is sure to stand up to the elements when responding to a call. Featuring a frequency of 400-4,000HZ and 120-130 decibels, you're sure to be heard and move traffic when responding with this speaker. The UBL 100-Watt Speaker is universal and will work with any siren or controller that you may already own.