Receiver mode: GPS, GLONASS, , BeiDou, QZSS and SBAS Frequency: GPS L1, GLONASS L1, BeiDou B1, SBAS L1, E1 72 search channel Baud rate: 4800bps-921600bps, 9600bps by default Output level: TTL or -232,TTL by default Output agreement: NMEA-0183 or UBX,NMEA-0183 by default Single :GNSS:1Hz-18Hz Standard :GNSS:1Hz-10Hz,1Hz by default Size: 28 x 28 x 10 mm The pins of the module are: 1., there is a second pulse output after positioning, the pulse period is 1s, and the high level lasts for 100ms, which is used for system synchronization. 2. GND, ground. 3.TX, -232 data output of the module. 4. RX, -232 data input of the module. 5. VCC, 3.6-5.5V, recommended 5.0V. 6. BOOT, please hang out during normal work. PIN PIN Name I/O Descriptions 1 1PPS O 1 Pulse per second when 3D fixed 2 GND G Ground 3 TX O Serial data output 4 RX I Serial data input 5 VCC I DC3-5V supply input, Typical: 5V 6 BOOT I C. LED: 1.TX LED: blue.The data output, TX LED flashing 2. LED: red. LED not bright when GPS not fixed,flashing when fixed. Colour:As shown in color Material:Electronic component Package Contents: 2 x 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.