ITEM NAME:2pcs 40mm 8ohm 8Ω 0.5W Audio Speaker Stereo Woofer Loudspeaker Trumpet Horn M&O Specification: Diameter: 40mm Rated Power: 0.5W Rated Impedance: 8Ω Frequency Response: 45kHz Directivity: Omnidirectional Sensitivity: Standard (dB / W) To-noise ratio: 92 ± 3dB Category: Electric (moving coil) Usage: radio, Sound toys Composition: Composition diaphragm Material: Non-paper Magnetic form: The magnetic frequency Features:Treble (high frequency) Package Include: Speaker x 2.Speaker x 2. Usage: radio, Sound toys. Features:Treble (high frequency). Magnetic form: The magnetic frequency. Material: Non-paper. Composition: Composition diaphragm. Frequency Response: 45kHz.