Microphone Unit is a sound sensor with a built-in omni-directional electret microphone. The signal is amplified and output by microphone preamplifier max4466. The amplifier can effectively suppress power supply noise and common mode noise, and the output signal has high sound recovery and can be used in noisy environments. The unit can not only output analog signals, but also output digital level signals. The built-in LM393 double voltage comparator can set the comparison voltage threshold by adjusting 10K adjustable resistance. The sensor is very suitable for acoustic electrical conversion, audio recording / sampling, FFT acoustic feedback, voice switch and other projects.. Product Features Audio record/sample Built-in microphone preamplifier MAX4466 Omnidirectional, 52dB sensitivity Digital output and analog signal Built-in dual independent precision voltage comparator and adjustable resistor, threshold adjustable Development platform: Arduino, UIFlow (Blocky, Python) HY2.0-4P interface Two Lego-compatible holes Applications FFT Spectrum Display Audio Sample / Record Voice Switch Color: White Material: plastic Package Contents: 1x Microphone Unit 1x Grove 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.