【HiFi Sound Quality】: This headphone amplifier is made of PP material and delivers high-fidelity sound quality, allowing you to enjoy a clearer and more detailed music experience. 【Powerful Amplification】: This portable headphone amplifier effectively enhances the driving power of headphones, producing more dynamic and detailed o for an immersive listening experience. 【Portable Design】: With a compact size and lightweight build, 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 control function, allowing you to adjust the bass effect according to personal preference while optimizing headphone performance for louder, clearer, and more realistic sound output. 【Wide Compatibility】: This HiFi earphone amplifier supports headphones with a 3.5mm jack and is compatible with various devices such as smartphones, tablets, and computers for convenient use. 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 variations in size may occur due to manual measurement. Display settings may vary.