The FrSky FAS-40 Ampere Sensor is a great device for real-time monitoring of your models power system. Compatible with the FrSky telemetry receviers, sensor hub and FLVS-01 (LiPo voltage sensor).Specs:Measurement range: 0~40AMaximum safe current: 40ASensor current consumption: 20mAUpdate Rate: ¡Ã1HzDimension: 31.5x24.5x5mmWeight: 9.7g