No, you can connect directly with your mobile phone. But it would only be recommended to apply in an environment without an internet connection. It will be much more flexible to use with a WIFI router which allows you to extend your reach all over your house or even control the device outdoors.

Firstly, please try adjusting the antenna and location where your device is put. Usually, the reception will be better near the windows, sometimes, an antenna signal booster will also be an option.Why cannot lock the channel frequency which I know is available?Usually, it happens when the signal is weaker than average. You can try to input the station frequency directly in the app or search the frequency with the “Step” option, increasing the frequency in smaller steps. It takes a longer searching time than usual, but it gets a better chance to lock the station.

It depends; all settings and messages will be kept in the internal memory and won't be lost even in a power failure situation. If you don't install a backup battery, you need to manually input the time or synchronize by connecting with your mobile in case of power failure; easy, right?

It can be used for OTA (Over The Air upgrade) or extending the storing capacity, and new features may be provided in the future

We provide an easy-to-use remote control for radio/white noise playback, and a time/alarm setting is also available on the device. But it will be so much easier for all settings and it will be needed to operate some functions like voice message recording with the app.

For customers concerned about blue light exposure, we offer polycarbonate blue light filter lenses for an additional $50. These lenses block more blue light than standard polycarbonate or high-index lenses and can be added to your order at checkout.