The Communication Bracelet

"Natsuhiko is a big idiot!"

When Natsuhiko saw this line of text appear on his scroll interface, he felt a toothache.

What is Kushina up to now?

This is a historic moment as it marks the first time humans have communicated through these bracelets, and this could even go down in history, yet you sent me such a sentence?

As for the culprit, Kushina was oblivious to this and exclaimed in surprise:

"Huh, isn't that the text I just typed? How come you have it on your side, too?"

Natsuhiko sighed helplessly and explained:

"Because that's the function of these bracelets."

Although this world already has primitive computers, they are merely tools for calculation and information storage and have not yet developed network technology. Therefore, it was customary for Kushina to find this surprising.

So, Natsuhiko further explained:

"The principle is simple. Kushina, you should have learned the basic principles of sensory arrays, right?"

"That is, converting chakra into chakra waves through an oscillation circuit, transmitting it, and then receiving and analysing the reflected chakra waves to obtain information about the surrounding environment."

Kushina nodded with a pained expression.

When Natsuhiko mentioned this, it reminded her of the tough days she spent learning those annoying things.

Natsuhiko continued:

"The bracelets we are wearing operate on a similar principle, with both transmission and reception of chakra waves."

"However, unlike sensory arrays that receive their signals, our bracelets receive each other's signals."

"When you pressed send just now, the text you typed was already loaded onto the chakra wave and transmitted."

"Then, my bracelet received the chakra wave, demodulated it back into text information, and finally displayed it on my scroll."

Since Kushina had learned the principles of sensory arrays, she pondered for a moment and roughly understood what Natsuhiko meant.

"Yeah, why didn't anyone think of using sensory arrays like this?" She clapped her hands, suddenly enlightened.

"Actually, someone did."

Natsuhiko smiled, "Do you remember the Yamanaka clan's secret Jutsu?"

"Their 'Mind Body Transmission' Jutsu, I suspect, uses a similar principle, turning sensory Jutsu into a means of long-distance communication."

"But compared to my small invention that can only transmit text and sound, their mental communication is much more advanced."

Natsuhiko didn't mention that during the Fourth Shinobi World War, there would be machines that could enhance the effect of the 'Mind Body Transmission' Jutsu, allowing Shikaku to communicate with the entire Allied Shinobi Forces.

Although Kushina hadn't seen it firsthand, she had heard of this signature Jutsu of the Yamanaka clan, so she quickly understood.

Thus, she looked at Natsuhiko with a strange expression.

After the Sharingan of the Uchiha clan and the Byakugan of the Hyuga clan, has Natsuhiko now started to copy the secret Jutsu of the Yamanaka clan?

Uchiha clan, watch out. This is the true Copy Ninja.

Kushina was mentally ridiculed.

Without noticing kushina's strange behaviour, Natsuhiko continued:

"However, the Yamanaka clan's Jutsu is complicated, with few people able to perform it. On the other hand, my invention can be popularised, so each has its strengths."

"And my device is just a newly born prototype, so it naturally has many flaws."

"The design of the oscillation circuit, tuning circuit, signal and chakra wave modulation and demodulation, etc., all have a lot of room for improvement."

"That's why I need your help, Kushina. After all, the transmission power of this device relies on brute force, and you, with your abundant chakra, are the best candidate for testing."

Hearing this, Kushina finally understood why Natsuhiko had given her this bracelet.

For some reason, she felt a bit disappointed.

So, Natsuhiko only wanted her for her chakra.

Seeing Kushina looking down and not speaking, Natsuhiko thought she was hesitating and added:

"That's right, this research will indeed take up a lot of your time and consume a lot of chakra, so if you're unwilling, it's okay. I can find Fugaku to help with the testing."

Upon hearing this, Kushina was slightly taken aback, and the image of Natsuhiko and Fugaku wearing matching bracelets flashed through her mind, sending a chill down her spine.

"Who said I was unwilling?"

Kushina immediately guarded her bracelet as if afraid Natsuhiko would take it back.

"I... I was just thinking about the principle you just mentioned," she argued.

Although he didn't understand why Kushina reacted so strongly, Natsuhiko felt relieved to see her willing to join the testing.

It worked.

Although Natsuhiko had mentioned the reasons for needing Kushina's help, the more important reason was so that Kushina could contact him at any time.

This way, even if she were kidnapped, she could call for help.

Even if a Kumogakure ninja took the bracelet, Natsuhiko could locate Kushina through the built-in transmitter.

This plan is foolproof.

Natsuhiko then repeatedly instructed Kushina not to take off the bracelet and to keep it on at all times.

"I'll also keep wearing mine. You can contact me anytime if you need anything."

Kushina nodded softly.

For some reason, her face started to turn red again.

It felt like she was with Natsuhiko even when at home.

In the following time, Kushina, having gotten a new toy, eagerly exchanged messages with Natsuhiko and even went out of the office to test the bracelet's maximum communication distance.

Unfortunately, the ninja academy was too small to test Natsuhiko's communication limits.

After two months of meridian training, Natsuhiko's chakra capacity had significantly increased.

Kushina then volunteered to go outside to test, but Natsuhiko managed to stop her.

If Kushina had wandered the streets, all his previous efforts would have been wasted.

Back in the sealing Jutsu office, Kushina still seemed unsatisfied.

This "telepathic" experience was indeed novel for a world still relying on messenger hawks.

After all, without Natsuhiko's early introduction of wireless radio, who knows when they would have learned about it?

Then Kushina thought of a question.

"Natsuhiko, I remember you mentioned wanting to popularise these bracelets."

"But these bracelets aren't cheap. How will you popularise them?"

Having studied sensory arrays, Kushina knew the materials required were quite valuable.

Moreover, the bracelets had to be made small, requiring even rarer materials.

Not to mention the other functions besides the sensory array.

Given that Natsuhiko's plan to popularise the duel disks was still making little progress, this higher-tech bracelet seemed even less feasible.

Hearing this, Natsuhiko smiled slightly. He had considered this problem.

He then swiped his hand, and a design appeared on the scroll before him.

Kushina leaned in and saw a drawing of a black obelisk and a black ring that resembled her communication bracelet.

"What's this?" Kushina asked curiously.

"This is the solution to your question," Natsuhiko said with a meaningful smile.

"For now, let's call it the Tower of Darkness."

(End of Chapter)

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