Yes, the alarm clock can be left permanently plugged in via USB (5V adapter not supplied).
The alarm clock is rechargeable (USB-C) and also runs on an internal battery, with a claimed autonomy of up to 3 months after full charge; the USB-C cable is supplied, but the 5V wall adapter is not.
I'm not entirely sure about the recommendations for prolonged use (e.g. leaving it constantly plugged in can, depending on the device, slightly reduce battery life) - the documentation supplied doesn't give precise instructions on this subject.
The alarm clock is not a radio-controlled alarm clock. It has a digital display, a sound sensor, backlighting and is powered by a rechargeable battery or USB power supply, but no radio-controlled clock function is specified. In contrast, the Flip+ RCC model is a radio-controlled alarm clock that sets the time automatically by radio signal.
Yes, there is a radio-controlled alarm clock version of the premium model. The alarm clock functions include both an alarm and a radio-controlled clock.
The volume of the alarm cannot be adjusted. There is no function for adjusting the volume of the alarm sound. According to the operating instructions, you can set the alarm time and alarm sounds, but not the volume. Users report that the volume is preset and is not perceived as too loud.
We source our products from different suppliers to ensure availability as far as possible. As soon as a supplier does not have the item in stock, we switch to a supplier with higher availability. Each supplier offers different prices, so there may be price differences. There can be various reasons for this, such as higher purchase prices for smaller quantities or additional import costs. We therefore work with daily prices. See here: digitec.ch/en/wiki/6028
No, the display of the Flip Premium does not remain permanently legible in the dark when the device is not connected. Without the cable connected, the LED display switches off automatically when the room is quiet and lights up again when you touch the device, knock on your bedside table or when it detects noise. However, if the device is permanently connected to a 5V USB cable, the LED indicator stays on all the time.
Because there was probably a mistake in the recording. Thank you for pointing this out. I have passed this on to the relevant department for correction and it will be dealt with as quickly as possible.
The Lexon Flip Premium alarm clock does not have a radio-controlled clock function. The described features of the product include a reversible LCD display, a sound sensor and a USB-C charging function, but no radio-controlled clock function.