SWM-40R5.5-32N0.5R

Features: 
Mylar
Full Range Sound
Natural Sound & Music
Slim size
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 84 Measured 84±3dB at 0.5W and 30cm.
Power W 0.5 1
Frequency kHz 0.32 0.32 2.5
Available Input Impedance Ω 4 32 150
Width mm 40
Height mm 5.5