SWM-17R4.0-8N0.5R

Features: 
Mylar
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 78.46 Measured 88±3dB at 0.5W and 10cm.
Power W 0.5 0
Frequency kHz 0.9 0.9 20
Available Input Impedance Ω 8 8 150
Width mm 17
Height mm 4

Dimension Drawing: