Key Features:
1. Use high-quality aluminum alloy material and steel gears, surface oxidation treatment, and be sturdy and durable.
2. Control the servo through CH3 and manually switch gears to two programs. Use the CH3 control program. The original factory remote control does not work together.
3. High speed 15.7:1, and low speed 56.6:1 provide two crawling speeds, and can easily cope with various road conditions.
4. Suitable for TRX4M original frame or other frames with large enough space. 
5. The gearbox is suitable for 2mm motor shaft brushless motors.
6. This 2-speed transmission can work with the Injora LCG carbon fiber frame.
Note: TRX4M 2-speed transmission Does not fit MEUS ripper chassis.
(Reason: Because the 2-speed gearbox's height is too high. The ripper's cab cannot be placed into this gearbox. The cab needs to be removed and some cutting work needs to be done. So by default, it is not compatible.)