Feature:1. Made of high quality metal, sturdy and High quality. Mini size, portable and lightweight.2. Small and lightweight, can drive 4 pairs of headphones and 4 independent volume.3. 4 headphone connectors do not interfere with each other.4. This balanced headphone amp has an independent MONO/STEREO control buttons. It is easy for you to simulate the mono or stereo effect.5. The headphone splitter/amplifier /mixer is ideal for use in both the home and professional environment. Perfect for podcasting, video gaming, streaming, and choirs.Specification:A headphone amplifier mixer is a device that combines multiple audio signals and amplifies them to drive headphones. Features:Made of high quality metal, sturdy and High quality. Mini size, portable and lightweight.Small and lightweight, can drive 4 pairs of headphones and 4 independent volume.4 headphone connectors do not interfere with each other.This balanced headphone amp has an independent MONO/STEREO control buttons. It is easy for you to simulate the mono or stereo effect.The headphone splitter/amplifier /mixer is ideal for use in both the home and professional environment. Perfect for podcasting, video gaming, streaming, and choirs.Specifications:Plug: EU / US(Optional)Material: MetalColor: BlackInput: AC 100-240V, 50/ 60HzOutput: DC 5VItem Weight: 170g / 5.99ozItem Size: 103 * 57 * 28mm / 4.05 * 2.24 * 1.10inPackage Weight: 280g / 9.87ozPackage Size: 13.7 * 13.7 * 5.2cm / 5.39 * 5.39 * 2.05inPackage List:1 * Headphone Amplifier1 * Power Adapter1 * User Manual (English)Package List:1 * Headphone Amplifier1 * Power Adapter1 * User Manual (English)