??- Model: HK906<br />- Material: plastic + metal<br />- Input voltage: 12V<br />- Current: 4A<br />- Sound level: 105dB<br />- Frequency: 400Hz (low) / 500Hz (high)<br />- Comes with 4pcs installation plates<br /><br />                                                                                                                                Dimensions: 3.94 in x 2.76 in x 0.98 in (10.0 cm x 7.0 cm x 2.5 cm)<br />Weight: 15.77 oz (447 g)<br /><br />