Question about Roberts Revival Uno BT

It is not possible to connect the alarm clock directly to the mains, as it is powered exclusively by batteries. However, there are models from Roberts Radio that can be operated with both batteries and mains power, such as the Revival Uno BT, which is not explicitly labelled as an alarm clock.

If you are looking for a product that can be connected to the mains, you should look for a model that explicitly has a mains power supply.