The SX 400 is the most efficient tool in a wide range of semi-professional measuring and control instruments, as the measured values can be easily read thanks to the large analog scale of the instrument. It is also an insertion-type RF power meter and can be permanently installed in a transmission system for continuous monitoring of the station's operating condition.
| Frequency range: | 140–525 Mhz |
| Power scale: | 0.5-400 W |
| Connector: | PL |
| Impedance: | 50 Ω |
| Accuracy: | 5W ± 5%/20 W ±7.5%/200 W ±10%/400W ±12.5% |
| Dimensions: | 15 x 6.5 x 10 cm |
| Weight: | 630 gr |
