Description All use multi-chip integrated circuits (SOT plastic package). This integrated circuit is soldered with gold wire balls. The production process is complicated, the service life is long, the performance is stable, and the product qualification rate is high. Voltage: 3VDC Maximum current: “=30MA/5VDC Minimum sound pressure=>85db/10cm Resonance frequency 2500 –300HZ Working temperature: -20——70 degrees Weight: 2g
