Main Features:<br />The 8 x 21 roof BAK4 prism  comes with high definition and high power， bring better experience<br />With small size of 91 x 60 x 35mm and weight of 150g， convenient to carry <br />Foldable binoculars， comes with eyepiece coated with FMC film， objective lens coated with blue film， receive bright field of view<br />Life water resistant， no need to worry in rainy days<br />131m / 1000m field of view， suitable for bird watching， mountain climbing， etc.<br /><br />    Specifications<br />General<br />  Brand: FX                                                  <br />                        Type: Binoculars                                                  <br />                        For: Beach， Bird watching， Travel， Auto racing， Horse racing， Boating/Yachting， Hunting， Outdoor activities， Theater， Sports                                                  <br />                        Color: Black                                                 <br />Specification<br />  Prism System and Material: Roof BAK4                                                  <br />                        Amplification Factor: 8X                                                  <br />                        Objective Lens (mm) : 21mm                                                  <br />                        Field of view: 6 degrees                                                  <br />                        Field Angle(degree): 131m / 1000m                                                  <br />                        Exit pupil diameter: 5.2mm                                                  <br />                        Exit pupil distance: 16mm                                                 <br />Basic Information<br />  Product weight   : 0.150 kg                                                  <br />                        Package weight   : 0.26 kg                                                  <br />                        Product size (L x W x H)   : 9.1 x 6.0 x 3.5 cm / 3.58 x 2.36 x 1.38 inches                                                  <br />                        Package size (L x W x H)  : 10.5 x 7.0 x 4.5 cm / 4.13 x 2.75 x 1.77 inches                                                  <br />                        Package Contents: 1 x Binoculars， 1 x Storage Bag， 1 x Lens Cloth， 1 x Hanging Rope                                                 <br /><br /><br /><br />                                            <br /><br /><br /><br /><br /><br /><br /><br /><br /><br />                                                <br />