If your remote has stopped working or won't program, here is the professional troubleshooting guide.
For further documentation, you can browse digital libraries like ManualsLib or Scribd , which host various RadioShack user guides. RadioShack 4-in-ONE REMOTE --- Control Remoto Universal Radioshack Rm-u1812 Manual
Note: It is compatible with Roku Streaming sticks or Amazon Fire TV/Stick . Power: Requires 2 AAA batteries (not included). Troubleshooting Tips If your remote has stopped working or won't
Use this if you do not have a specific code or if your brand is not listed in the manual. the device manually. --- Control Remoto Universal Radioshack Rm-u1812 Manual