Features BASS EFFECT: The resonance speaker has a strong bass effect, equivalent to an 8 inch traditional speaker, which is efficient and practical. FULL FREQUENCY: The resonance speaker has a full spectrum frequency range, and the sound quality in each frequency range is very clear. INTERNAL MAGNETIC: The vibrating speaker is internal magnetic circuit design, single direction, which has high sensitivity and good stability. SPECIFICATIONS: The resonance speaker is circular shape with standard 35MM specification, the compact structure for easy connection. WIDE APPLICATION: Widely used for sound playback and amplification on computers, MP3, MP4, CDs, mobile phones, and other devices. Specification: Item Type: Resonance Speaker Magnetic Circuit Form: Internal Magnetic Type Sensitivity: 85dB/W Rated Power: 5W Signal to Noise Ratio: 85dB Harmonic Distortion: 5 (TMD%) Diaphragm Material: Non Paper Frequency Feature: Full Frequency (Full Range) Directionality: Single Direction Package List: 1 x Resonance Speaker Package List 1 x Resonance Speaker