Graupner GR-12L HoTT 6 Channel Receiver HOPPING TELEMETRY TRANSMISSION 2.4 GHz technology with two-way telemetry, updatable firmware? The newest features always! Two receivers included! Servo connections in the front panel. All servo/signal connectors are JR style and compatible with both analog and digital servos The receiver supports generation of SUMO/SUMI/SUMD signal output on Ch 6 for the convenient use of gyros and control boards Refresh rate (PERIOD) of 10 and 20ms programmable?20 ms is recommended for use with analog servos to avoid servo "growl" Small form factor with a 5.5" antenna lead is ideal for small models and for use as a satellite receiver to reduce servo wiring runs