Main Features:<br />Operating distance: 10m<br />Working current: Less than 5mA<br />Standby current: 2.5mA<br />Operating temperature: -10 - 55 degrees<br />Modulation System: GFSK<br /><br />    Specifications<br />Specification<br />  Product weight   : 0.165 kg                                                  <br />                        Package weight   : 0.390 kg                                                  <br />                        Product size (L x W x H)  : 24 x 10.5 x 0.6 cm / 9.4 x 4.1 x 0.23 inches                                                  <br />                        Package size (L x W x H)  : 25.5 x 12 x 3 cm                                                  <br />                        Package Contents: 1 x Bluetooth Kerboard， 1 x User Manual， 1 x USB Cable                                                 <br /><br /><br /><br />                                                <br />