Main Features:<br />- Wide working voltage: 3 - 5V<br />- 4 display modes: Only time / only date / only temperature / alternate display<br />- Temperature display function， display range: -9 to 60 degree， with error correction setting ( -5 to 5 degree )<br />- With time display error correction function ( -9 to 9 sec )， need 24 hours continuous power supply<br />- Uses DS1302 chip for time keeping， comes with 1 x CR1220 battery<br />- Uses 5PRM crystal oscillator， high accuracy<br />- Great for DIY projects<br /><br />    Specifications<br />General<br />  Material: PCB + Plastic + Copper                                                 <br />Weight and Size<br />  Product Weight: 0.013 kg                                                  <br />                        Package Weight: 0.060 kg                                                  <br />                        Product Size(L x W x H): 5.0 x 1.9 x 1.8 cm / 1.97 x 0.75 x 0.71 inches                                                  <br />                        Package Size(L x W x H): 6.0 x 2.9 x 2.8 cm / 2.36 x 1.14 x 1.10 inches                                                 <br />Package Contents<br />  Package Contents: 1 x 4-Digit LED Electronic Clock Temperature Display Module                                                 <br /><br /><br /><br />                                                                                            <br />