Usage Tips:1、FLEXIBLE OPERATION: Wall Volume Control supports 5 speed adjustable, non slip design, simple operation makes volume adjustment more flexible. 2、LOSSLESS SOUND: Wall volume control knob has a lossless sound quality and stable output to ensure the sound quality is not affected. 3、FLAME RETARDANT PC: 50W volume controller knob is made of PC material, fire retardant, safe and reliable, durable and long lasting. 4、SIMPLE WIRING: 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. Product Description: Volume Controller KnobTuning: Five Position TuningMaterial: PC,Aluminum Alloy Color: GoldSize: Approx. 86 x 86mmPackaging content: 1 x Volume Controller Knob,2 x Screws 1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.