The ImmersionRC RF Power Meter V2 is a must for your FPV toolbox. This meter is the best way to check the RF links between you and your drone before you get in the air. It tests both of the critical links, control and video allowing you to tune your system.
Features:
Affordable RF power measurements, a fraction of the cost of similar equipment
Measure pulsed, and continuous RF power levels (e.g. UHF, and A/V Downlinks)
Calibrated on all common bands used for modeling, and especially FPV
Accurate RF power measurements
Touch-Free race compliance
PowerScope mode
Average or peak measurements
Integrated Li-ion battery
Internal attenuator