HiFi Sound Quality: Made of PP material, this headphone amplifier delivers high-fidelity sound performance, providing a clearer and more detailed o experience. Powerful Amplification: This portable headphone amplifier enhances the driving capability of headphones, producing more dynamic and detailed sound for an immersive listening experience. Portable Design: Compact and lightweight, this headphone volume amplifier is easy to carry and can be used at home, in the office, or on the go. Two-Level Gain Switch: The 3.5mm headset amplifier features a bass volume control, allowing you to adjust the bass effect according to personal preference and optimize headphone performance for louder, clearer, and more realistic sound output. Wide Compatibility: This HiFi earphone amplifier works with headphones that have a 3.5mm jack and is compatible with various devices such as smartphones and computers. Size: 9.4cm x 6.1cm x 1.6cm (3.70in x 2.40in x 0.63in) Package Includes: 1 x Headphone Amplifier Note: Slight measurement variations may occur due to manual measurement and different display settings.