Main Features: Max power: 180w, frequency response: 4000hz-26000hz, sensitivity: 90dB, 4Ω. The tweeter with dust cover provides solid and reliable protection also provides treble cancellation of road noise and loud bass. External diameter: 5.7cm/2.24", opening size: 4.9cm/1.93", installation depth: 1.7cm/0.67". Good Performance: This is a speaker with high sensitivity, perfect language resolution and voice performance. When you are driving on a wide road, you can feel the extra impact that high power provides to your car audio system. Perfect Tweeters: Suitable for kinds of musical styles, popualr, classical, rock,etc. Can be used at home or in a car. Excellent voice resolution and voice performance. Instant Installation: Fits anywhere, no magnetic field, tapes and credit cards are safe. Note: Before buying, please confirm installation size, ensure the length and height of car tweeters is suitable for your car. Before installation, please carefully check the car horn lines, if grounding or collising, please reconnect the lines before linking our machine.