"New props?" Qianyu asked, sitting on the Beetle. "For all of us?"

"Yes," Dr. Agasa nodded. "A self-defense prop for all of you - although Qianha, you and Conan both have self-defense capabilities, Ayumi and the others don't, so I made this new prop."

"But why did you take us in the car to pick it up?" Qianyu tilted his head. "If it was a prop made by you, Doctor, shouldn't it be at your home, Doctor?"

"I am just good at mechanical devices, and that person has high attainments in material chemistry, so I entrusted him to add coatings to these props." Dr. Ali said. "In this way, this new prop can survive in water without being damaged.

Used next.”

"Underwater?" Conan asked. "Electronic props?"

"Yes," Dr. A Li nodded. "The main structure of this prop is an electronic prop, but a mechanical mechanism is also added to store... self-defense materials."

"Materials used?" Qianyu raised an eyebrow. "Disposable?"

"That's right," Dr. Ali said with a smile. "But don't worry, this thing is very convenient to replenish!"

"It's very convenient..." Qianyu curled his lips.

Since it is a very convenient self-defense material, it means that this part is obviously a low-end weapon with relatively low technical content... Although it may be very useful, as a mechanical expert, Qianyu still feels that those precision creations with complex ingenuity are more useful.

To his liking.

"Those mechanisms of yours are not high-tech." Haiyuan Ai, who was sitting next to Qianyu, slightly raised the corner of his mouth after seeing Qianyu's expression. "It won't be complicated if the mechanism is broken into pieces and explained.

No matter where you go, the value of an institution lies in its own effectiveness, isn't it?"

"Same." Qianyu shrugged.

"It's right ahead," Dr. Ali said at this moment while lightly applying the brakes.

…

This is a single-story villa area, and Dr. Ali parked his car in front of a villa - the name Qianyu on it was not impressive, and it was obvious that this was not a famous person.

Dr. Ali walked to the door and pressed the doorbell.

After a while, a middle-aged woman opened the door. "Who are you?"

"I am a friend of Dr. Nagano, and I came here to pick up the things he asked him to make before." Dr. Agasa said. "According to his request, I also brought the children who use these products."

"Ah, okay," the middle-aged woman nodded and invited Dr. A Li, Qian Yu and others into the room. "Hongji, you have a guest!"

When Qianyu and others walked to the living room under the leadership of this lady who was obviously his wife, a middle-aged man and three young men were already sitting in the living room.

"Doctor, you're here," the middle-aged man said with a smile. "Well, they are indeed a group of children!"

"After all, it's like you said," Dr. Ali replied with the same smile. "No adult would use this kind of badge, right?"

"Well, come on, here are the things for you." Nagano Hongji opened a box placed in front of him and handed it to Dr. Agasa. "There are six copies in total."

"Well," Dr. Ali opened the box and looked at the contents. "The materials used are quite sophisticated. I was originally worried that you would use some material with a strong smell to process the medal."

"How is that possible?" Nagano Koji curled his lips. "I'm not so weak that I can't make high-quality paint that even children can use."

Dr. Agasa handed the box to Conan beside him, and then Conan took out a badge with a curious look on his face - it was a Sherlock Holmes-shaped badge, and there was a small black box hidden on the back of the badge - this was obviously an electronic

Partially.

"Badge?" Qianyu took the box from Conan in surprise and also took out a Sherlock Holmes-shaped badge.

The whole badge is not too heavy... The bottom of the small box on the back of the badge has a small opening that looks like it is temporarily blocked by two half-moon-shaped plugs - the most common use of this small opening is to spray liquid. However.

If this small box is used to hold the kind of self-defense materials the doctor mentioned before, the electronic device is...

Qianyu handed the box to Haihara Ai, and then fumbled for the badge.

There is a knob on the top of the small box and a button on each side symmetrically.

Judging from the two half-moon-shaped plugs at the small opening, the two symmetrically positioned buttons should be the starting mechanisms of the two plugs.

Qianyu pressed the remaining knob.

Then, the badge in Conan's hand and the badge Haihara Ai had just taken out halfway from the box all made a beep-dee-dee sound, and the box also made a more dense beep-dee-dee sound.

"Oh!" Qianyu exclaimed and quickly pressed the knob again, and all the badges became silent again.

"You are very smart," Nagano Koji kept looking at Qianyu and nodded approvingly. "That button is the switch for the entire radio intercom system. As long as you press it, this badge will connect to the communication channel and send messages to other badges at the same time.

Send a communication request. As for the two symmetrical buttons, if they are pressed together, pepper spray will be sprayed from the bottom of the badge. As long as it can be sprayed into the eyes of the bad guys, it can easily repel the enemies."

"Pepper water," Qianyu tilted his head and looked at the nozzle at the bottom. "Excuse me, how far can it spray?"

"One meter to one and a half meters," Nagano Hongji spread his hands. "I know the distance is a bit short, but we must also consider that the badge itself is so small and the jet power is very limited - even this range requires the remaining battery of the badge to be used up.

Most of the electricity."

"Excuse me," Qianyu asked. "The nozzle is so big, is the pepper water sprayed out a scattering spray?"

"Yes," Nagano Koji nodded. "After all, although this will reduce the power, it will also make it easier for you to spray the spray into the enemy's eyes."

"..." Qianyu looked at the nozzle and had a plan in his mind.

If this opening is narrowed, maybe a high-pressure pepper spray gun can be used... With the calculation of the auxiliary unit, even if it can only shoot a thin line of pepper spray, it should be able to accurately hit the enemy's eyes...

At this moment, Mrs. Nagano came over with a pot of tea and began to pour tea for everyone. "Please use it."

"?" Qianyu glanced at the number of cups, but found that there were only ten cups - the people present were Dr. Agasa, Qianyu and other six children, Nagano Koji and three young men. In theory, eleven cups are needed.

Can.

"It's almost lunch time, I'm going to take my insulin first." Nagano Hongji nodded slightly, and then left.

"Huh?" Dr. A Li was stunned. "We are just here to get the badge, what can I do to you..."

"My husband likes children very much," Mrs. Nagano explained. "Perhaps he saw these cute little guys, so he loved them very much. After he knew that you would bring the children, he ordered me to follow the number of you.

Enough food has been cooked."

…

Twenty minutes later, everyone was seated at the dining table—except for Nagano Koji, who had not yet finished his insulin injection, and Mrs. Nagano, who went to see him because she felt that Nagano Koji's tardiness was a bit rude.

"It doesn't take that long to take insulin." Haihara Ai frowned slightly. "Why hasn't Mr. Nagano come back yet?"

"Teachers usually have the habit of continuing to work after taking insulin," a young man said. "Perhaps the teacher works too seriously, so he forgets to eat?"

"Perhaps the teacher remembered something when he was injecting insulin? This kind of thing happens often." The second young man said.

"Perhaps the teacher went to see his favorite Tang Sancai statue?" the last young man said. "The workmanship of that statue is really exquisite, so it is deeply loved by the teacher."

At this moment, Mrs. Nagano's anxious voice came from outside the restaurant door.

"Old man? Old man? Wake up, old man?"

After everyone fell into astonishment, Qianyu reacted immediately, rolled down his chair, followed the direction of Mrs. Nagano's voice who kept calling, and after turning a few times, came to an open door.
Chapter completed!