Main Features:<br />Size: 50.5mm x 50.5mm x 12mm<br />Weight: 21 gram (Inc Piezo buzzer)<br />IC: Atmega324 PA<br />Gyro/Acc: InvenSense Inc.<br />Auto-level: Yes<br />Input voltage: 4.8-6.0V<br />Signal from receiver: 1520us (5 channels)<br />Signal to ESC: 1520us<br />Firmware version: 1.6+<br /><br />    Specifications<br />Dimension and Weight<br />  Package Weight: 0.06 kg                                                  <br />                        Package Size (L x W x H): 12 x 9 x 3 cm                                                 <br />Package Contents<br />  Package Contents: 1 x Flight Controller Board? 1 x Flight Controller Board Box? 1 x Wire                                                 <br /><br /><br /><br />                                            <br /><br /><br /><br /><br /><br /><br /><br /><br /><br />                       Product Safety Disclaimer: <br />We do not accept any responsibility or liability for misuse of this or any other product.  All our products are extensively tested to comply with rigorous and strict QC standards.  For certain products (e.g. toys? knives? etc.)? we recommend proper supervision as we cannot be held liable for misuse or accidents.<br /><br />                                                <br />