Feature: 1. Small Light: H1 helicopter flights controller is light in weight, small in size and compact in structure. 2. Easy to Install: The H1 flights controller adapter module is easy to install and requires no complicated procedures. 3. Parameter Data: RC H1 flights controller module input voltage is 5‑8.4V, output voltage is 3.3V. 4. Strong Practicability: H1 flights controller adapter module enables such receivers to be used normally on H1 flights controllers. 5. Scope of Application: RC helicopter flights controller is suitable for H1 flights controller, used to transfer DSM2/DSMX satellite receiver. Specification: Item Type: DSM2/DSMX Transmitter Material: Electronic Components Colour: Black Input Voltage: 5-8.4V Output Voltage: 3.3V Applicable Receiver: DSM2/DSMX Satellite Module Size:Approx.18 x 9mm / 0.7 x 0.4in Applicable:For H1 Flights Controller. Package List: 1 x DSM2/DSMX Transmitter Note: Before using this module, you need to match the satellite receiver and remote control to a good frequency, otherwise it will not work. This module does not provide the frequency pairing function.