Feature:1. Professional: Sound external tweeter is very professional and can handle high frequencies with ease. Rated power is 35W, impedance is 4.2. Tweeter Compensation: Super tweeter speaker unit is mainly used for sound treble compensation, especially suitable for full range sound. After the addition of the super tweeter speaker, the treble is more delicate.3. Convenient: Professional tweeter can be installed on the outside of the speaker, more convenient. Retrofit your old speakers and install new tweeters.4. Function: Sound external tweeter unit allows you to make the most of your system, providing you with everything that is missing in stereo sound.5. Durable: Super tweeter speaker unit is made of premium plastic and metal for durability and small size for portability and ease of use.Specification:Item Type: Sound External Tweeter Material: Plastics, MetalsRated Power: 35WImpedance: 4Product Size: Approx. 108x80x53mm / 4.3x3.1x2.1in .Package List:1 x Sound External Tweeter 1 x Base3 x ScrewsNote:1. Tweeter can not be directly connected to the amplifier, must be crossed over the crossover frequency. Must be connected to the tweeter output of the crossover, or in series with a 2.2F to 3.3F tweeter capacitor, or it will be burned, please note the positive and negative polarity.2. Manual measurement, please allow slight error.