Features:<br> 3-band preamp EQ equalizer,<br> Features accurate tuning, backlight LCD display, battery indicator light<br> Rotate to adjust frequency(bass, middle, treble) and volume level, very convenient.<br> Connect with external speaker and audio inputs, press to control playing music from memory card or USB disk.<br> Lightweight, compact 3-band equalizer, well fitted into the acoustic guitar, allows easy tweaking controls, for better performance.<br> Package include: 1 x EQ equalizer, 1 x piezo pickup rod, 1 x battery box, 1 x battery, 10 x mounting screws, 1 x plastic base, 1 x cable tie.<br> Specifications:<br> Material: Plastic + Electronic Components<br> Color: Black<br> Bass: +/-12dB at 75Hz<br> Middle: +/-12dB at 750Hz<br> Treble: +/-12dB at 10KHz<br> Tuning Range: 0A(27.5Hz)-8C(4186.01Hz)<br> A4 Frequency: 440Hz<br> Memory Card Slot: Yes<br> USB Port: Yes<br> Power Supply: 1 * 6F22 9V Battery<br> Product Dimension: 79*49*26mm / 3.11*1.92*1.02in<br> Net Weight: 95g / 3.35oz<br> Package Size: 10.5*7*7cm / 4.13*2.75*2.75in<br> Package Weight: 160g / 5.64oz<br> Note:<br> 3 band EQ equalizer set only, other accessories in the pictures are not included.<br> Please read the user manual carefully for more information, before usage.<br> Due to lighting or other reasons, the picture and material object may slightly differ.<br> Due to manual measurement, there may be deviation, please in kind prevail.<br> Packing List:<br> 1 * 3 Band EQ Equalizer<br> 1 * Pick-up Rod<br> 1 * Plastic Base<br> 1 * Cable Tie<br> 10 * Screw<br> 1 * 6F22 9V Battery<br> 1 * User Manual<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin