Accel Power Source 8 Isolated Output Pedal Power Supply for Guitar Effects Pedals 8 Outputs; Each Output is Completely Isolated and Regulated with Over voltage Protection! Designed with a High Efficiency Transformer, User's Manual & Customer Mounting Hole Template The Power Source 8, powers 9V, 12V & 18V effects pedals. Also can be switched to all 9V outputs. Dimensions; 6.00" L X 3 1/2 " W X 1 3/4" H. Power supply weight 1lb. 9 oz. Easy 3 screw mounting to all Accel Pedal Boards!