<ul><li>Small and Delicate; Aluminum Case, CNC Machining Process; Gold-plated pins</li><li>3.5mm Audio In: Connect Tablet PC, Computer, Phone, Audio Player.</li><li>3.5mm Audio Out: Connect Power Amplifier, Active Speaker, Headphone Amp</li><li>Replaceable signal cable; High-end step potentiometer; Bottom spongy cushion</li></ul> Features: Small and Delicate; Aluminum Case, CNC Machining Process; Gold-plated pins 3.5mm Audio In: Connect Tablet PC, Computer, Phone, Audio Player. 3.5mm Audio Out: Connect Power Amplifier, Active Speaker, Headphone Amp Replaceable signal cable; High-end step potentiometer; Bottom spongy cushion Dimensions(W*H): 49.8 * 39.4 mm / 1.96 * 1.55 in Weight: 0.2 kg / 7 oz Package includes: 1 Volume Controller

Nobsound Mini Active Volume Control Knob Volume Controller 3.5mm Audio Adjuster PC Speaker Amplifier Switcher