Biamp Commercial Audio E-VOL40. Type: Rotary volume control, Mounting type: Wall-mounted, Product colour: White. Power handling: 40 W, Input operation voltage (max): 100 V. Export Control Classification Number (ECCN): EAR99. Width: 80 mm, Depth: 50 mm, Height: 80 mm. Package width: 89.9 mm, Package depth: 89.9 mm, Package height: 85.1 mm