Features: Support base stations positioning, omnidirectional positioning The battery backup, support hot start warm start, positioning speed is greatly enhanced Positioning data to support independent acquisition and serial port configuration, more option, more convenient. Positioning data also support the serial port, through the AT commands and configuration, more quick and easy. Computer debugging video a strong hit, make dear friend faster 868 function New various microcontroller program, greatly helped by single chip microcomputer rapid development Specifications: Component:PCB Size:Approx.4.8x5cm/1.89x1.97inch Note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 1 Set Development Board