SPEAKER 20MM 0.3W 8OHM 580HZ 95D - 8 Ohms General Purpose Speaker 300 mW 350 Hz ~ 6 kHz Top Round
71dBSPL: PDRIVE = 0.3W, distance = 0.5m
0.3W continuous dissipation
580Hz free-air resonance
20mm diameter x 2.45mm dimensions