The default baud rate of F9P is 38400bps. To prevent the data from being too large to be mitted, the baud rate is also increased when the frequency is increased. The frequency is recommended not to exceed 5HZ. F9P board supports centimeter-level high-precision RTK differential positioning. Small size, light weight. If used as a base station mode, just configure it to mode. If the F9P module is used as a mobile, it can be directly used as an RTK mobile station without any configuration. Suitable for research and development, drones, unmanned ships, unmanned driving, robots, driving schools, surveying and mapping, precision agriculture, mountain landslide monitoring, mine monitoring, vehicle navigation, walkie-talkies, differential base stations and other industry application products. Chip:ZEDF9P-01B-01 Frequency:GPS L/L2; GLONASS G1/G2; BeiDou B1/B2; GaliLco E1/E5; QZSS L1/L2 Working mode:GPS+QZSS+GLONASS+BeiDou+GaliLco multi-mode positioning Channel:184 channels Baud rate:4800dps-921600dps, default 38400 Output level:TTL level Output protocol:NMEA-0183, RTCM Update frequency:1HZ-20HZ, default 1HZ FLASH:4M FLASH, configuration can be changed, power off without loss Pulse per second:0.25HZ to 10MHZ configurable, default period 1s, high level lasts 100ns Carrier phase output:support, output RAWX sentence The product appearance and printed words may vary depending on the batch, but this does not affect use. Colour:As Shown Material:PCB Package Contents: 1 * GPS Module 1 * Connecting Cable 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.