Features: Adopting a visual clear basin frame design, coupled with magnets (magnetic energy product 10 times higher than ordinary magnets), high magnetic density can be achieved in a small size of 0.75-1 inches, and driving efficiency can be improved by more than 30%. The clear structure combines optimization with technological aesthetics, making it suitable for open sound modification and display. Imported diaphragm provides smooth high-frequency response (frequency ranges: 2500-18000kHz), low distortions rate, and precise reproduction of voice and string detail. 4 ohms impedance compatible for mainstream power amplifiers, with a sensitivity of 91dB±2dB, and can output clear sound with low-power driving. Fast response speed, excellent high-frequency ductility, eliminating the trailing distortions phenomenon of ordinary ferrite horns. Specifications: Appearance: round Composition method: Combination of paper basins Diaphragm material; nonpaper Magnetic circuit form: single magnetic type Frequency characteristics: treble (high frequency) Rate power: 4W Directionality: High frequency Frequency response: 2500-18000kHz Sensitivity: 87.3dB/W Package Includes: 1 Piece Tweeter Speaker 4ohm note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.