Microphone Amp with high sensitivity and ALC automatic level control, providing 1000 times amplification to capture weak sounds. Practical uses include direct headphone driving and mobile phone recording with a 3.5mm interface. Dependable performance with aluminium alloy shell, compact size, and stylish appearance. Better design ensures lossless signal transmission and strong anti-interference performance. Smart carrying with a compact size of 65 x 53 x 25mm for convenient storage and portability. Item Type: Microphone Amplifier Product Material: ABS, aluminium alloy. Power Supply: DC 5V Interface: . 3.5mm / 0.14in Battery: 250mAh 502030 li battery, with built-in battery. Color: As Shown Material: ABS+Aluminum Alloy Package Contents: 1 x Microphone Amplifier 1 Cord 1 x Headphone Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.