Welcome to our shop! [Good Production] This mini active volume control knob features a small and exquisite design. It is made with a metal shell and ALPS rotating shaft, using CNC machining process to ensure a strong structure. [3.5mm Interface] The volume controller has a 3.5mm input that can be connected to tablets, computers, mobile phones, and players. It also has a 3.5mm output that can be connected to power amplifiers, active speakers, and headphone amplifiers. [High Performance] This volume controller is designed with linear on board inductors to ensure a good listening experience. It also has a replaceable signal cable, high-end stepper potentiometer, and bottom foam pads. [Plug and Play] This mini active volume control knob is easy to use, simply plug and play. If you use it with an OTG cable, it can also be used with mobile phones. [Wide Applications] This is the best volume controller for watching videos, playing games, and even various events such as weddings, celebrations, conferences, and shows. Item Type: Mini Active Volume Control Knob Material: Aluminum Alloy Model: M1 Colour: Black Interface Input: 3.5mm / 0.14in Interface Output: 3.5mm / 0.14in 1 x Mini Active Volume Control Knob 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.