Adjustable Headphone Amplifier, Designed for 16-150 Ohm

This portable headphone amplifier supports driving headphones within a 16 to 150 ohm impedance range. It operates via direct plug-and-play connection through a 3.5mm jack and includes a built-in rechargeable battery for extended mobile listening. 1. Connectivity and Compatibility: Equipped with a 3.5mm audio input and output port for direct integration with smartphones, tablets, and various digital music players. 2. Power and Runtime: Contains a 1000mAh lithium battery that delivers approximately 6 hours of continuous operation, recharged through a DC 5V supply. 3. Construction and Specifications: Manufactured from black ABS material, the device maintains a frequency response of 20Hz to 20kHz plus 3dB, with an internal operating voltage of +4V. 4. Audio Performance Metrics: Produces a maximum power output of 250mW at a 16 ohm load, featuring a distortion rate of 0.004 percent and a signal-to-noise ratio of 2120dB. 5. Package Contents: Shipments include exactly one headphone amplifier unit, with all additional cables and components excluded from the box.