Enhanced Audio Experience: This portable headphone amplifier features a 3.5mm audio jack for both input and output, ensuring compatibility with a wide range of devices including smartphones, tablets, laptops, and gaming consoles. Its compact design makes it easy to carry for on-the-go audio enhancement.Optimal Performance with GAIN Switch: Equipped with a high/low gain switch, this amplifier allows you to adjust the output to match the performance of your headphones perfectly. Whether you're using high-impedance studio headphones or more casual listening devices, you can optimize the sound to your preference.Long-Lasting Battery Life: With a 1000mAh battery, this amplifier can provide up to 15 hours of continuous audio enhancement. The device is conveniently via a Micro-USB port, making it easy to recharge and ensuring you never miss a beat.Wide Compatibility: The amplifier supports a load impedance range of 16-150, making it suitable for a variety of headphones from like for , for , and for . It's also compatible with devices such as the for , for , for , and for various mobile phones, ensuring versatile use across your electronic devices.Color: BlackMaterial: Metal+PlasticPackage Contents:1 * Amplifier1 * CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.