"Microphone", "miniature camera" and so on are really new terms that girls have never heard of.

Madeleine couldn't help asking: "What is this for?"

Robb smiled and picked up a miniature wiretap the size of a rice grain, and said, "Before introducing its principle, let's try its function first."

After speaking, Robb glued the earphone with the size of a grain of rice to the bottom of the stone table.

Then, he took a corresponding box, walked to the portal, and threw it over. The palace guard on the other side of the portal quickly picked up the box and sent it to the queen and Madeleine.

Robb said: "You now turn off the communication crystal ball and listen carefully to the movement of the box."

The queen replied and turned off the communication crystal ball.

Then, both women stared at the box. Suddenly, they heard Robb's voice from the box: "Marian, you didn't get this question right!"

"Ah? Isn't it right?" Marianne's voice followed closely: "Then what to do..."

Behind is the voice of Robb talking about the topic, okay, okay...

Then Lilian’s voice sounded again: "Master, last time you said what fish-flavored pork shreds you wanted to eat, I failed again. I think, just add a spoonful of fish soup to the pot and fry it. You can fry the smell of fish."

"No!" Robb said categorically: "You must not add fish to Yuxiang Pork, otherwise you will go into the evil way, it is not authentic, I will tell you again, Yuxiang Pork should do this..."

When the queen heard this, she was overjoyed: "Clerk, remember, quickly write down this fish-flavored shredded pork method."

After a few minutes, the communication crystal ball was reactivated.

As soon as she got on the phone, Madeleine threw herself in front of the crystal ball and said joyfully: "I understand, this thing is only the size of a grain of rice, it sticks to other people’s homes, and others can’t find it, and then we can overhear the opposite. The voice of people talking... this thing is indeed very suitable for spies to steal the other party’s military secrets without knowing it."

"Yes." The queen's expression was not as cold as before, and she actually joined the topic: "It is used to eavesdrop on other people's recipes, that is really..."

Speaking of this, I suddenly found that everyone was looking at her with weird eyes, and hurriedly coughed: "I'm talking about eavesdropping on the enemy's military plan... Well... how did you do this thing?"

Robb said, "Look, this rice-sized thing is actually a crystal ball, but I cut and polished it to be very small, the size of a rice-grain. Then, let Godfahter give me a reduction technique to shrink me too. You can write runes on this little crystal ball."

"I only wrote runes to collect sounds on this crystal ball, without images, and this crystal ball is not two-way communication. It only needs a unilateral call from the box, and it will start to work. It does not require manual operation. Answer, this is different from ordinary communication crystal ball."

"In addition, there is not only a crystal ball for playing sound, but also a crystal block for storing sound. While eavesdropping, we can also record the other party’s voice. In this way, you are eavesdropping on Yuxiang. When shredded pork is used, you don’t have to write it down quickly by the clerks, you can record the sound and replay it over and over again."

"I didn't secretly remember the practice of fish-flavored shredded pork." The queen first resolutely denied this explanation, and then nodded: "Of course, you can't let the other party pick it up manually, otherwise it will be exposed. Is it right? This idea of ​​unilaterally making a call and then directly connecting and starting work is very clever! This is a great invention, and it can be called a strategic magic item."

Hearing that her best friend so affirmed this invention, Madeleine couldn't help being overjoyed. She directly defined it as a strategic level. It was great. Those who made strategic level magic items were properly rewarded by the royal family.

But the queen immediately shook her head and sighed: "Unfortunately, the production method is too limited. With such a small crystal ball, only a ghost man can draw runes. Other people don't know how to reduce it, and they can't draw runes. , Then there is no way to make it."

At this time, Robb cut his consciousness to the points, and said with a smile: "It's okay, you can order from me with money. For the sake of our acquaintances, I won’t charge you any more, and I will sell it to 20 gold coins. You set."

"Important strategic-level magic items, how can they always rely on orders." The queen said.

"Don't think so." Robb said, "I said it last time. One day, wise people will develop a method of painting on rice grains. Then you can customize it yourself. You need to do it now. It’s not here to spit my groove, but to buy some bugs from me for spare use, and at the same time train those craftsmen who are full of wisdom, and ask them to what extent they can use the micro-engraving technology."

Queen: "Don't speak so nicely. Even if I die, I jump off the wall of the City of Light. Don't spend money on this."

Robb cut his consciousness to the body and said to his clone: ​​"Godfather, this invention, I originally wanted to give it to Miss Madeleine, but it must be made by your reduction technique, so... you just have to Shrink the money for the small technique, I won’t charge them for the part of the money I invented, okay?"

Robb's consciousness switched back to the clone again, and nodded, "That's all! For your face, 50% off, a set of ten gold coins!"

"Deal!" The queen slapped the table, for fear that Robb would go back. This thing is indeed a very useful invention. Miss Queen can't wait to give this thing to the spy and install it in Mondela's palace. , And then listen to that the villain who usurped the country and seized power was discussing with the ministers all day and night about something frantic.

"And this miniature camera." Robb took out the second thing, a crystal ball smaller than a cherry: "It and a bug are the same principle, they are activated in one direction, but the crystal ball is too small. The captured image is very blurry. After repeated tests, I found a crystal ball of this size. The image it transmits back is still barely visible. Although the resolution is much worse than that of the live camera, it is used for monitoring. enough."

"If you take it secretly to the enemy’s home, install it in some less conspicuous places, you can see the privacy of the opponent, and it can also be used to install it on some important military bases for monitoring and defense, in case the enemy takes advantage of it. Sneak in when there are no guards..."

The queen knew it was a good thing when she heard it: "If you get a 50% discount, I will buy this too!"