GS-4M is a 2-band EQ with a built-in microphone control, a chromatic tuner and a nice colored LCD display. It’s easy for the user to control the sound of the microphone with the Blend knob. The position of the microphone is adjustable with a flexible gooseneck. Moreover, it’s very easy to install into a guitar and the size is compact. It works with 2 pcs of CR2032 batteries and has automatic battery charge detection. Low battery message is displayed when the battery is getting low.

 PARAMETERS:

    Features: 2 band EQ / chromatic tuner / piezo+mic pick-up / blend control
    Input impedance: 10MΩ
    Frequency Response: 20Hz-20kHz
    Control Range: Bass ±12dB at 100Hz / Treble ±12dB at 4kHz
    Pick-up: piezo ceramic pick-up/microphone pick-up
    Output jack: 6.35mm
    Low battery check LED
    Battery life: over 36 hours
    Power supply: 2 x cr2032
    Dimensions: 64mm(L) x 37mm(W)​​​​​​