Description:Support most high-impedance 16-300 headphones, 3.5mm AUX input and output, signal-to-noise ratio100Db, THDandN=0.0003 percent , fully filter out noise, and enjoy high-quality audioThis headphone amplifier enhances the signal input to the amplifier circuit to achieve the best performance of the headphone, not only output louder sound, but also output clearer and more realistic stereo without distortionAdopts 600mAH rechargeable lithium battery, keep the headphone amplifier working for more than 8 hours. In addition, there is a volume control knob to adjust the volumeCompatible with various digital devices, such as MP3, MP4, Phone, Pad, computers, CD players and personal media players, for one, for PS4 or PS5 controllers, etc. .Portable and Lightweight, designed to let you enjoy musicSpecification:Type: Headphone AmplifierSize:Approx.9.5 x 6.2 x 1.5cm or 3.7 x 2.4 x 0.6 inchHeadphone amplifier Audio Input: 3.5 mm,Audio output: 3.5 mmBattery capacity: 600mAHWorking voltage: DC3.7-4.2VCharging voltage: DC5VPackage Includes:1x Headphone Amplifier1x Audio cable1x USB CableNote:1.Please allow 13 cm error due to manual measurement, thanks.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.