Once upon a time owning a clock was a status symbol. Only the very wealthy and powerful could afford one. Ordinary people had to rely on the church- or town-clock. Privately owned clocks were only found in the finest places and were displayed in prominent positions for all to admire.
The expensive clock on the mantelshelf is no longer distinguishing. New artifacts have replaced them as status symbols.
The House of Saud under King Salman and his son Clown Prince Mohammed bin Salman have developed a taste for a specific type of these. They can be seen at the center of dozens of official photos of the Salmans meeting foreign and domestic dignitaries. Unlike decent clocks these artifacts are of little use within the staged context.
The various artifacts the Salmans collected are of different designs but are all sourced from the same manufacturer. Their inevitable center place stinks of product placement. We know that the Salmans need money. They nab, incarcerate and torture the richest people of their country to rob their wealth and assets. The Salmans originally expected to make $800 billion from the current raid. They now cut their expectations down to a mere $100 billion. In the end it will less than half of that. It will not be enough to fill the holes in the Saudi budget.
But paid for product placements in official pictures? The few million dollars such product placements bring are like a drop of rain in the Najd. It evaporates before it reaches the ground. Are the Salmans THAT broke?
Spot the artifacts here:

President Abdel Fatah al-Sisi meets King Salman – bigger

U.S. Secretary of State Kerry meets King Salman – bigger

German Chancellor Merkel meets King Salman – bigger

U.S. Secretary of State Kerry meets MbS – bigger

France's Foreign Minister Jean-Yves Le Drian meets MbS – bigger

German Chancellor Merkel again meets King Salman – bigger

Saudi Muftis meet MbS – bigger

U.S. Secretary of State Tillerson meets MbS – bigger

Yemeni Islah Party head Mohammad al-Yidumi meets MbS – bigger

A Pakistani General meets MbS – bigger

Pakistani Army chief General Raheel Sharif meets then Saudi Crown Prince Salman (Note: 2 artifacts)- bigger

Lebanese Prime Minister Saad Hariri meets King Salman – bigger

Lebanese Prime Minister Saad Hariri meets MbS – bigger

Pakistani Prime Minister Shahid Khaqan Abbasi meets King Salman bigger

Lebanon's Christian Maronite patriarch Beshara Rai meets MbS – bigger

U.S. Secretary of State meets King Salman – bigger

Pakistani Prime Minister Sharif meets King Salman – bigger

Spanish King Felipe VI meets King Salman – bigger

Former Turkish President Abdullah Gul meets King Salman – bigger

Palestinian President Mahmoud Abbas meets King Salman – bigger
An alternative explanation is possible. Overpriced CISCO products like these telephones are infested with NSA snooping software. It might well be that some crafty U.S. agent convinced the Salmans to put these always-on microphones wherever they meet with someone of interest.
But even that does not answer the deeper questions. These phones will never be used during the staged photo opportunities for the press. Why then put them there? Why do the Saudi tyrants consider such phones to be something to show off? What do they symbolize to them or to the public?