3.5mm AUX & Type C Versatility: 3.5mm AUX and USB Type C ensure a more reliable and stable connection. SNR>120Db and +N 0.002% can produce clearer and more real stereo sound without distortion. Wide Application: This headphone amp is remarkably compatible with various digital devices with 3.5mm AUX output such as MP3, MP4, phones, for controllers, and the Type-C input is compatible with mobile phones, computers and laptops. 16-600Ω HiFi Headphone Amp: Supports 16-600Ω impedance, the headphones help high impedance or low sensitivity headphones to be better driven, it is delicate, compact, lightweight, which can be carried easily. 2-Stage Gain Switch and Bass Boost: It enhances the signal input to the amp circuit for optimal headphone performance. Volume Control and Shell: There is a knob for you to adjust the volume, which is also an on/off switch. Aluminum alloy housing, overall shielding reduces signal interference and improves heat resistance.