Bluetooth V4.0 <br />             <strong>Operation distance:</strong> 10m <br />             <strong>Features:</strong> Portable,Durable <br />             <strong>Functions:</strong> Improve driving safety <br />             <strong>Color:</strong> Black <br />             <strong>Special function:</strong> LED display, Dual USB car charger                                            <strong>Package weight:</strong> 0.114 kg <br />             <strong>Product size (L x W x H):</strong> 4.00 x 4.00 x 1.50 cm / 1.57 x 1.57 x 0.59 inches <br />             <strong>Package size (L x W x H):</strong> 18.00 x 13.00 x 4.00 cm / 7.09 x 5.12 x 1.57 inches