Features 1.5 SPEED ADJUSTABLE: Wall Volume Control supports 5 speed adjustable, non slip design, simple operation makes volume adjustment more flexible. 2.LOSSLESS SOUND QUALITY: Wall volume control knob has a lossless sound quality and stable output to ensure the sound quality is not affected. 3.FLAME RETARDANT PC MATERIAL: 50W volume controller knob is made of PC material, fire retardant, safe and reliable, durable and long lasting. 4.SIMPLE WIRING DESIGN: Volume control rotary knob is designed with simple wiring, convenient and easy for everyone to get started. 5.ALUMINUM ALLOY FRAME: Volume controller knob is designed with aluminum alloy frame, which is fashionable and simple, and better integrates into the home environment. specificationItem Type: Volume Controller Knob Material: Flame Retardant PC, Glass, Aluminum Alloy Tuning: Five Position Tuning Product Size: Approx. 86 x 86mm / 3.39 x 3.39in Power: 50W+ PackageList1 x VolumeControllerKnob 2 x Screws NotePlease allow some error due to manual measurement.