GPS module This BN-220 GPS Module features the latest 10th generation chip and requires no driver for use. For connection with RPi, connect red to 3.3V, black to GND, green to TXD, and white to RXD. The flashing TX LED indicates normal GPS module output. A flashing LED indicates the GPS module has acquired location data. Data level: TTL or RS232, default is TTL level. For RS232 output, a TTL to RS232 converter cable is required. The BN-220 GPS Module includes 4M Flash memory to save configuration settings, eliminating the need to reset data on subsequent uses. Baud rate range: 4800bps to 921600bps, default set at 38400bps. Material: Metal Color: As shown Package Contents: 1 x Module 1 x Link Cable Note: Light reflection and display differences may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3cm.