Model Number: YDZ100-9-8F70M
Category
Application: Fire/Safety, Ceiling
Size: 101-135mm
Feature Icons:
Features: Narrowband, water proof, High sensitivity (SPL), T-YOKE threaded mounting holes 
Specification:
Diameter: 102*102mm
Cone material: Mylar
Edge: Mylar
Nominal power: 10w
Maximum power: 20w
Impedance: 8±15%OΩ
Voice coil: Oslash;19.45mm
Fo: 900±20%Hz
Response: Fo-4KHz
S. P. L: 100±3dB/1W/1M
Magnet size: Oslash;70*24*10 (Ferrite) 

Net weight: 452g