DescriptionAre you looking for a professional, yet affordable headphone amplifier? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional headphone amplifier must meet your needs. It is one of the best choices for you.Features- Color: Black. - Material: Aluminium alloy. - Size: About 9.80X6.00X1.50cm/ 3.85X2.36X0.59inch. - Made of premium material for long lasting use. - Lightweight and compact, easy to carry with you. - Help low thrust players drive headphones better . - Increase the sound field, the sense of three-dimensionality and depth.- gift for friends and family, it's useful and practical.SpecificationBattery capacity: 2000mAh Audio input and output interface: 3.5mm stereo interface Internal voltage of the amp: 7.5V Use time: more than 8 hours Distortion: (THD+N) 0.0003% Signal to noise ratio: (SNR)> 100dB Charging current :1A Output power :40mW Suitable for headphone impedance: 16-150Q