Headphone amplifier with Bass Boost function and 130~150 hours large battery life, that turns listening to music into a true audio experience. It has a durable metal body, output power 120mW x2 (16 load) and 13mW x2 (300 load), Bass Boost 4 dB, headphone impedance of 16 ~ 300 and a frequency response of 10Hz ~ 100KHz. It can be charged via USB or micro USB inputs and has a headphone jack output. The device has volume controls and battery LED signalization. Dimensions: 111,5 x 58,6 x 11,3 mm. Weight: 122 g. Color: Black.