For safe transport, the remote control doesn't comes with battery. Please buy CR2025 Battery and install properly. 2. If you have installed CR2025 battery, please check if installed upside down or if out of power with your battery. 3. don't test the remote control in phonelink mode, because some buttons don't work in this mode, you can test it by pressing the volume up and volum down in radio mode. 4. Test the remote control near the "IR receiver hole " at the top of the unit.