The American Audio DB-Display LED decibel display from ADJ is what you need to monitor your volume. Make sure your speakers stay in great shape by keeping those DB's under control through this monitoring system. The American Audio DB-Display is designed to fit into any amp rack, so you can put it anywhere. The LED display progresses from green through amber, to red. A 12V power supply is included so there is no need to worry about buying extra accessories. The American Audio DB-Display is perfect for an entertainer or DJ and will work with all your other equipment. You will have access to 2 separate modes, Dot, and Bar.