- Color: Black<br />- Rated sound level: 110dB<br />- Warning tilted angle: 15~20 degree<br />- The driver is wearing on ear、 while drowsiness、 head tilted forward、 the device will issue a warning、 causing the driver to wake up、 thus avoiding the occurrence of traffic accidents<br />- Powered by 3 x LR41 cells (included)<br />- Great for safety driving<br /><br />                                                                                                                                Dimensions: 3.07 in x 2.01 in x 0.59 in (7.8 cm x 5.1 cm x 1.5 cm)<br />Weight: 0.42 oz (12 g)<br /><br />