Short Description: 15*15*4mm, 850Hz, 8ohm,0.5W, 87dB,SMD Speaker Model number SSP1540MN-R08W0.5A Rated/Max Input Power. 0.5W /0.8W Rated Impedance. 8Ω ± 15% Sound Pressure Level. 87dB(0.5W/0.1m) ± 3 dB at AVE 1.0K 1.6K 2.0K 3.2K Hz Resonance Frequency (Fo). 850±20%Hz Frequency Range. F0~20kHz. Previous: SSP1340MN-R08W0.5A SMD speaker, 13x13x4.0mm Next: SSP2045MN-R08W0.5A SMD speaker, 20x20x4.5mm