SWM-18R4.3-8N0.5R

Features: 
Mylar
Full Range Sound
Waterproof
Characteristic Minimum Rated Maximum Notes
Type of Magnet NdFeB
Type of Frame Metal
Type of Diaphragm PET
Type Magnetic
Sound Pressure Level dB at 30cm 86.46 Measured 96±3dB at 0.5W and 10cm.
Power W 0.5 0
Frequency kHz 0.85 0.85 20
Available Input Impedance Ω 4 8 150
Width mm 18
Height mm 4.3

Dimension Drawing: