Outdoor Weather Proof Speaker Alluminium Grille Tweeter: 3 /4th inch Power Handling: 30 / 15 Watts on 100v Frequency Response: 95 -13.5 Khz Sensitivity: 88 ± 3 dB Dimensions (mm): 265*235*260 Glass fiber re-inforced plastic Do not connect on 8 ohms Amplifier. Please connect on100v amplifier