DESCRIPTION: 2.4GHz fh-e 3 CH (spread spectrum communication system) waterproofrx-391w is not compatible with telemetry function. Frequency 2.4GHz fh-e channel 3 CH nominal input voltage 4.86.0 dimensions 31.9 x 26.5 x 14.5 mm weight 12.7 g This item fits the following: radio mx-6