Four-star eight-frequency GPS: L1/L2, BDS: B1/B2, GLONASS: L1/L2, GALILEO: E1/E5b high-precision positioning GNSS module 4800dps-921600dps baud rate, default 38400 Small size, light weight RTK differential positioning accuracy 0.01 meters 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 x GPS Module 2 x Connecting Lines 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.