Item Type: Headphone Amplifier <br>Material: Aluminum Alloy <br>Battery: Lithium Ion Battery 502030 (Built In) Capacity: 250 MA <br>Power Supply: DC 5V <br>Interface: Approx. 3.5mm/0.1in <br>Practical Use: Direct Drive Headphones To Listen, Can Be Connected To Cell Phone Recording <br>Size: Approx. 65x53x25mm / 2.6x2.1x1.0in1、HIGH SENSITIVITY: Headphone amplifier has high sensitivity, ALC automatic level control, 1000 times amplification, so you can hear the faint sound. <br>2、CLEAR SOUND: Portable headphone amp amplifies your voice with clear, crisp, noiseless, distortion free sound, stylish and powerful. <br>3、INTERFACE IS 3.5MM: Stereo headphone amplifier direct drive headphones to listen, can be connected to cell phone recording, the interface is 3.5mm. <br>4、ALUMINUM ALLOY HOUSING: Microphone amplifier with aluminum housing, compact size, storage and carry are very convenient, beautiful appearance. <br>5、ANTI INTERFERENCE: Headphone amplifier ensures lossless signal as well as strong anti interference performance, very reliable. 6、APPLICABLE RANGE: Headphone amplifier is suitable for teaching, trainers, singers, coaches, shopping malls, presentations, outdoor speeches, etc.Please allow some error due to manual measurement<p>1 x Microphone Amplifier</p><p>1 x Power Cord</p><p>1 x Headphone Cable</p>