Main Features:<br />● Credit card size transmitter + sensitive RF receiver<br />● About 20 - 30 meters detection range<br />● Credit card size transmitter fits in any wallet<br />● The transmitter is powered by 2 x CR20126 battery (included in product)<br />● The receiver is powered by 2 x CR2013 battery (included in product)<br /><br /><br />    Specifications<br />General<br />  Best Use: Backpacking，Camping，Casual，Emergency，Hiking，Running，Travel                                                  <br />                        Features: Battery Included，Portable                                                  <br />                        Functions: Long life                                                 <br />Product Details<br />  Color: Black                                                 <br />Dimension and Weight<br />  Product weight: 0.036 kg                                                  <br />                        Package weight: 0.120 kg                                                  <br />                        Product size (L x W x H): 8.40 x 5.50 x 0.40 cm / 3.31 x 2.17 x 0.16 inches                                                  <br />                        Package size (L x W x H): 21.00 x 12.00 x 4.00 cm / 8.27 x 4.72 x 1.57 inches                                                 <br />Package Contents<br />  Package Contents: 1 x Key Finder， 1 x Key Chain                                                 <br /><br /><br /><br />                                            <br /><br /><br /><br /><br /><br />                                                <br />