Feature●【Material】Mriuuod voltage discs are made of brass and ceramic, with high processing precision, good stability and long service life.●【Size】The voltage pickup diameter 27mm/1.06in, wire length 100mm/3.94in, thickness (porcelain and copper) 0.35mm/0.014in●【Performance】Resonant frequency 3.5 +/- 0.5KHz, resonant impedance max. 300 ohms, static capacitance 22000(PF) +/- 30%●【Use】For DIY projects, acoustic instrument pickups, contact microphones, cigar box guitars, electronic drum triggers, touch sensors, electronic toys, etc.●【After-sales】We are online every day to help you solve any problems that may arise and give you a comfortable shopping experience.Description