Microphone Amplifier Volume Adjustment Real-time Monitor Funtions

Features:
The item can adjust the volume level of your microphone(3.5mm audio plug), and can real-time monitor the input sound from microphone.
Powered by 1pc 1.5V AAA alkaline dry battery (not included). Adopt the low power circuit design, making its runtime up to 10-15 hours.
Adopt the low noise circuit design, 16-level electronic volume control, long-lasting and durable in use.
Built-in phone/camera microphone system switching circuit, compatible with multiple video/ sound recording devices.
Use superior 3.5mm nut interface socket, ensuring reliable connection.