Complaint
| Functions | FD-200A | FD-200D | FD-200C | FD-200B | FD-200G |
| Display | No | B/W | Colour | B/W | Colour |
| Backlight | No | Yes | Yes | Yes | Yes |
| Build-in speaker | Yes | Yes | Yes | Yes | Yes |
| Battery indicator | No | Yes | Yes | Yes | Yes |
| FHR display | No | Yes | Yes | Yes | |
| FHR curve | No | No | Yes | No | Yes |
| FHR voice function | No | Option | Option | Option | Option |
| Various work modes | No | Yes | Yes | Yes | Yes |
| Alkalinity battery | Yes | No | No | Yes | Yes |
| Ni-Mh battery | No | Yes | Yes | No | No |
| Charge in device | No | Yes | Yes | No | No |
| Earphone | Option | Option | Option | Option | Option |
| Carry bag | Option | Option | Option | Option | Option |
