Description of Speaker 8 ohm 2 W This speaker is suitable for audio amplifier circuits, talking robots,toys etc.Most basic speakers are round – but not this one! It measures 40 x 20mm x 6mm and is designed to fit into rectangular enclosures. The speaker is rated to 2 Watts and has an 8 ohm impedance. Wires will need to be soldered to the easily accessible pads on the back of the speaker. To keep it in place, it also has mounting holes on each corner. Resistance: 8 ohm Power consumption:2W