2pcs 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino 2pcs 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino It will work well for home audio-visual equipment and other HiFi speakers, radio replacement, also suitable for DIY hobby soldering. Resonance Frequency :190Hz ±20%, Output Sound Pressure Level :77dB ±3dB, Insulation Resistance:10MΩ Rated Impedance: 4 ohm, Rated Power: 3W, Diameter: 2 inches Not include the Volume Control Cable