| Product name | GR-903 | GR-9028 | GR-9029 | GR-901 |
| Product type | RTK Receiver (Base and rover) | RTK Base Station | RTK Data Logger | RTK Receiver (Base and rover) |
| RTK Base (NTRIP Caster ready) | Yes (Android, Windows) | Yes (Android, IOS) | No | Yes (Windows) |
| RTK GNSS data logger | Yes (Android) | No | Yes (Android, IOS) | Yes (Windows) |
| RTK GNSS receiver | Yes (Android, Windows, Linux) | No | Yes (Android) | Yes (Windows) |
| Comes with IOS APP | No | Yes (BLERTK) | Yes (BLERTK) | No |
| Comes with Android APP | Yes (SPPRTK) | Yes (BLERTK) | Yes (BLERTK) | No |
| Location Sharing feature | Yes (By SPPRTK app -Android only) | No | Yes (By BLERTK app -Android only) | Yes (Windows) |
| Physical ON/OFF button | No | Yes | Yes | No |
| Physical POI button (for waypoint collection) | No | No | Yes | No |
| Stateout function | Yes | No | Yes | Yes |
| USB connector | Type A (male) / power and data | Type C (female) / charging only | Type C (female) / charging only | Type A (male) / power and data |
| Bluetooth Protocol / Profile | SPP | BLE | BLE | No |
| Build-in rechargeable battery | No | Yes | Yes | No |
| RTK protocol | RTCM 3.3 | RTCM 3.3 | RTCM 3.3 | RTCM 3.3 |
| RTK GNSS chip | Ublox F9P | Ublox F9P | Ublox F9P | Ublox F9P |
| Accuracy | 1.4cm (1cm + 1ppm) | N/A | 1.4cm (1cm + 1ppm) | 1.4cm (1cm + 1ppm) |
| Waterproof | IPX7 | IPX7 | IPX7 | IPX7 |
| GNSS Band | L1, L2 dual band | L1, L2 dual band | L1, L2 dual band | L1, L2 dual band |