The bottom three batteries ...

It is a corded phone with the dimensions of 26 x 9 x 2.5 cm black son comes with three (one black, one red and one white), a cable connection to the phone jack, a notice only in French ( yay!) .... and 3 AAA batteries.

With three batteries, this phone offers the functions expected of modern phones are:
storage of the date, time, phonebook.
Several rings are available with two levels of loudness;
This phone can be wall mounted (screws are not included). It has a dial on top of the handset which is the scoreboard. This horizontally tilts up to 30 ° for better readability.
This table is by default backlit lighting switches off 30 seconds after being used (to save battery but a setting keeps the permanent lighting).

I like a phone that does not require a power source and does not keep a permanent display (source of light pollution and extra cost).

After set up, my impression is that the quality of the telephone line is better, my old phone sizzled.
In short, I am very satisfied with this phone whose price is very reasonable.