SH Sonic Basic is an easy-to fit preamp system for acoustic and classical guitar. With the 2-band equalizer-controls (bass and treble) you will be able to adjust your personal, acoustic sound easily.Because Sonic preamps are installed into the soundhole there is no need to cut a hole in the bout/frame of the guitar. The system works with a 3V cell battery and comes an active Nanoflex pickup.When Nanoflex technology was born it opened the window to the beautiful world of the natural guitar sound reproduction. Only Nanoflex pickups sense the vibrations of the guitar strings and the movements of the soundboard simultaneously. The sound is sweet and percussive with exact attack. This gives the feeling of having a microphone mixed with an undersaddle pickup.Due to active amplification directly at the guitar pickup and 100% shielding of the entire system, no sound will be lost and no hum created.To exchange the batteries push the left and right clip gently together and pull out the battery holder.The complete system is extremely light and weights less than a 9V battery other preamps work with.