1. The default baud rate of this module is 9600 2. The power supply voltage is 3.3V-5V (can be directly connected to 5V or 3.3V power supply, core operating voltage 3.3V) Can be directly connected to 3.3V or 5V microcontroller 10 for wiring details: 1. VCC power supply (3.3V-5.0V) 2. GND grounding 3. TXD module serial port sending pin (TTL level, cannot be directly connected to RS232 level!), can be connected to the RXD of the microcontroller 4. RXD module serial port receiving pin (TTL level, cannot be directly connected to RS232 level!), can be connected to the TXD of the microcontroller 5. clock pulse output pin During the processing of this product, the ceramic antenna may be worn out, which is normal. The product is new. If you mind, please do not place an order. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Type:NEO-8M Colour:Random Color(Color is random, no specification is accepted) Material:PCB Package Contents: 1 * GPS Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.