Feature: 1. 3.5mm AUX and Type C: 3.5mm AUX and USB Type C ensure a more reliable and stable connection. SNR>120dB and THD+N 0.0003% can output clearer and more vivid stereo without distortion. 2. Widely Compatible: Compatible with 3.5mm AUX output digital devices such as MP3, MP4, mobile phones, game consoles, etc. Type C input is compatible with mobile phones, computers, laptops, etc. 3. 16‑600Ω HiFi Headphone Amplifier: Supports 16‑600Ω impedance headphones, helping high impedance or low sensitivity headphones to be better driven, exquisite, compact, light and portable. 4. Aluminum Alloy Shell: Sturdy and durable, overall shielding, reducing signal interference, and enhancing heat resistance. The volume control knob is also a switch, you can adjust the volume and switch operation. 5. Two Stage Gain Switch and Bass Enhancement: It enhances the signal input to the headphone amplifier circuit to obtain the best headphone performance. With bass switch, provide a more delicate and round bass performance. 6. Rechargeable Lithium Battery: It adopts a 3000mAh rechargeable lithium battery, which can make the headphone amplifier work for 10‑15 hours. Comes with Type C cable and audio cable, plug and play. Specification: Item Type: Headphone Amplifier Size: 9.8 x 6 x 1.3cm / 3.8 x 2.4 x 0.5in Material: Aluminum Alloy Colour: Black Battery Model: Lithium Battery (Built In) Capacity: 3000mAh Continuous Use Time: 10-15 Hours Standby Time: ≥120000 Hours Charging Time: 3 Hours Charging Voltage: 5V/1A Maximum Output Power: 100mW 32Ω / 60mW 600Ω (load) Load Resistance: 16-600Ω (Can Push the Resistance Range of Earphones) Distortion: 0.003% Signal to Noise Ratio: ≥120dB Response Frequency: 20Hz-20kHz (±3dB) The Highest USB Playback Quality: 24-bit/192KHz Parameters: Compatible with a variety of digital devices with 3.5mm AUX output such as MP3, MP4, mobile phones, etc. Type C input is compatible with mobile phones, computers, and laptops. Enhance the signal input into the headphone amplifier circuit to make the headphones play the best performance. With bass switch, provide a more delicate and round bass performance, giving you a more shocking music experience. Package List: 1 x Amplifier1 x Vocal Cable1 x USB Power Supply Line1 x Type C Data Cable1 x Manual