Enhance your audio experience with this high-performance Electret Microphone Amplifier, designed for clear and powerful sound amplification. Crafted from durable aluminum alloy, this microphone preamplifier features a built-in bias and a 3.5mm input interface, making it compatible with electret microphones and condenser microphones with a 3.5mm connection. Its adjustable gain and versatile output options provide excellent flexibility for various audio applications. Key Features: · Compatible Microphone Interface: Equipped with a 3.5mm input interface and built-in bias voltage, this amplifier supports electret and capacitor microphones, ensuring broad compatibility. · Adjustable Gain Control: Offers a gain range of 0 to 20dB, allowing you to fine-tune sound amplification to suit different recording and sound environments. · Robust Power Supply: Powered by a DC 5-12V input with an internal 3.7V 150mAh lithium battery, rechargeable via a standard mobile phone charger, providing over 10 hours of continuous use on a full charge. · Multiple Output Ports: Provides three output options including independent and mixed outputs; the mixed output port can directly drive headphones for convenient monitoring. · High-Quality Operational Amplifier: Utilizes the MC33202 rail-to-rail operational amplifier to deliver stable gain and clear sound amplification. · Durable Aluminum Alloy Construction: Ensures reliable performance and long-lasting durability in various settings. · Versatile Output Interface: The 3.5mm sound preamplifier output can connect to microphone inputs, auxiliary devices, line inputs, but is not intended for headphone listening except via mixed output. Specifications: · Material: Aluminum Alloy · Item Type: Electret Microphone Amplifier · Power Supply Voltage: DC 5-12V · Internal Battery: 3.7V 150mAh Lithium Battery · Input Interface: 3.5mm · Gain Range: 0-20dB Adjustable Package Includes: · 1 x Electret Microphone Amplifier This Electret Microphone Amplifier is the ideal companion for enhancing microphone signals, enabling clear and customizable audio output with flexible connections and long-lasting power. Perfect for sound recording, broadcasting, and audio projects requiring reliable amplification and versatile functionality.