| Model | COFDM-901T | COFDM-902T | COFDM-903T | COFDM-904T |
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| Price | $406 | $483 | $1,365 | $683 |
| Unique Selling Point | Smallest | CVBS Input | Quality best | Recommended Popular |
| RF Frequency (optional) | 1500Mhz | 900Mhz | ||
| RF Frequency ( default) | 839,832,846,853, 906,912,918,924 |
Pre-set at Factory: 170~900Mhz | Operate at extra board | |
| RF Power | 200mw | 1W | 1W | 1W |
| Delay | 200 millisecond | 200 millisecond | 200 millisecond | 200 millisecond |
| HDMI input | Yes | Yes | Yes | Yes |
| CVBS input | No | Yes | No | Yes |
| Air To Ground Distance (Line-Of-Sight, UAV, Drone) | 3km | 8km | 15km | 10km |
| Ground LOS Distance (Line-Of-Sight) | 500m | 800m | 1km | 1km |
| Ground NLOS Distance (Non-Line-of-Sight) | 200m | 500m | 600m | 600m |
| Video Compression Format | H.264 (MPEG2~4) | H.264 (MPEG2~4) | H.262 (MPEG2 only) | H.264 (MPEG2~4) |
| Power Voltage | 5V | 10~35V | 12V | 12V |
| Weight | 0.105kg | |||
| Dimensions | 52 * 40 * 14 | 100 * 43 * 10 mm | 118 * 66 * 22 mm | 80 * 58 * 24 mm |
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