Descriptions : Arduino Compatible Active Speaker Buzzer Module  arduino sensors - Black- Arduino buzzer module- Voltage: 5V- Active Speaker- Suitable for PC, printer, car audio system DIY Item: Arduino Compatible Active Speaker Buzzer Module - Black Dimensions: 0.98 in x 0.59 in x 0.08 in (2.5 cm x 1.5 cm x 0.2 cm)Weight: 0.21 oz (6 g)