Professional pickup with preamp for double bass that provides absolute natural sound with zero hum. It is based on the revolutionary Nanoflex technology and built to reproduce the instrument's vibrations authentically with every move of the bow in all positions. The pickup does not only take the vibrations of the strings like common under-saddle pickups but senses the vibrations of the strings and the body of the instrument simultaneously. Due to active amplification directly at the pickup and 100% shielding of the entire system, no sound will be lost and no hum created. The system also offers volume and tone control and a 6.3mm output socket and works with a 3V cell battery.