Product information:

Material: Hardware + Magnet + Plastic
Applicable models: general purpose
Voltage: 12 (V)
Maximum power: 70 (W)
Impedance: 4 (Ω)
Speaker unit size: 100 (mm)
Sensitivity: 89db
Frequency response range: 60-20Khz
Distortion: less than 1%

Size Information:

Outer diameter: 100MM
Mounting hole diameter 115MM
Total height: 45MM
Installation depth: 38MM

Packing list: 

speaker*2+. speaker cable*2+instructions*1+installation screws*8