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 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, 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. Item Type: Volume Controller Knob Tuning: Five Position Tuning Power: 50W+ How to Use:DIY installation ready to use Color: As Shown Material: PC+glass+aluminum alloy Package Contents: 1 x Volume Controller Knob Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.