The system points mall has long been opened, and Lin Zifan has used this function to buy a tampon making machine before.

But before, the points mall could only buy things that Lin Zifan had obtained.

Now, with Lin Zifan's cultivation breaking through to the Yuan Spirit, the system mall has already been updated once.

It's all-encompassing, it's everything, even a special spaceship!

But as soon as Lin Zifan saw the series of zeros behind the price, he knew that he definitely couldn't afford it!

As for the ultra-high-power radio station, it is affordable to buy. But Lin Zifan is also going to use the points to buy a hydroelectric generator to support the electricity of the entire Datang, so the radio station can only do it himself.

One point and ten points, that's a tenfold difference!

"And ......"

The corners of Lin Zifan's mouth hooked.

[Check the host's strong desire and trigger a new quest!]

[New Mission - Radio Station!]

[Mission requirements: within a month, build a radio station, and be enough to maintain communication between Chang'an and the three provinces!]

[Mission Reward: A set of ultra-high-power radios!]

[Failure Punishment: Yang. Impotence for a month!]

"Sure enough, the mission reward is this...... Tsk tsk. ”

The corners of Lin Zifan's mouth were slightly hooked: "Only spend one point, buy a set of tutorials, and develop it yourself, not only can you complete the task and get the points back, but you can even earn a few points~!"

"Not only that, but the ultra-high-power radio station can also be obtained, isn't it beautiful?"

"But ......"

Your uncle, what the hell is impotence for a month?

I'm going to do that love with the empress every day, and if something happens to me......

"Salted fish, I remember you so much, you are ruthless!"

Lin Zifan scolded with a smile.

[Hehehe, do you think this system is so easy to bully???]

"Isn't it?"

After exchanging views with the system for a while, Lin Zifan finally became free and opened the 'tutorial' he purchased......

Two-way radio intercoms are used to transmit and receive voice messages.

Each two-way radio contains a transmitter and receiver, a microphone and a megaphone, an antenna and a power supply.

Portable two-way wireless communication is battery-powered, while vehicle-mounted radios can use the car's power supply.

When the user speaks into the microphone, the voice signal is converted into an electronic signal.

This signal is processed by the transmitter and amplified into a radio signal, which is then transmitted to the antenna, which transmits the radio signal into the air.

The receiver's antenna receives the radio signal and sends it to the receiver. The receiver converts this radio signal into the original voice, and then the loudspeaker of the radio radio emits it, and the original message can be heard.

In a simple two-way radio system, when two or more radio radios "talk" to each other, they must operate on the same frequency. In a single-frequency simplex system, each radio user can transmit or receive information at any time......

The content on the tutorial is a bit complicated, and if people who don't understand it read it, they must be dizzy and can't figure it out.

Fortunately, Lin Zifan is a science dog, but it is not difficult to understand, after seeing it, he directly began to take the girls of the department to work together......

There are many metals, and Lin Zifan has already obtained a lot of them from the 'mineral map' from the Ministry of Industry before, so there is no need to look for materials.

Even, Lin Zifan also sent out some people to get back all kinds of rare metals that he only might use and store some for later use.

Therefore, he can directly start 'inventing' in the department!

Walkie-talkie, the biggest difficulty, is actually the battery!

The battery is completely created from scratch, and Lin Zifan can only find a way to get it done!

Lithium batteries, there is no need to consider them in a short period of time, and only more traditional dry batteries can be used.

It's not a big deal, and it will be done quickly......

In addition, almost all of them are flat, and there is no problem that can bother Lin Zifan for more than a day, so that in just five days, the first pair of walkie-talkies was successfully manufactured!

"This is a walkie-talkie?"

"Can you achieve the effect that the adults said before?"

"Even if it's far away and you can't see, can you talk?"

The women of the department looked at the walkie-talkie of 'big brother', their eyes widened, and they felt extremely curious.

What is a walkie-talkie? They don't know, and they don't know what Big Brother is.

But they knew very well that if they could talk normally and be heard clearly from miles away, this thing would be ...... Artifact!

It wasn't too difficult to get the sound to come out a few miles away, but even a Yuan Spirit cultivator had to do it with all his might or shout hard to make the sound go so far.

Want to have a normal conversation?

"To do it or not, try it and find out!"

Lin Zifan nodded and smiled: "Spring, summer, autumn and winter, you bring a walkie-talkie, find a place within three miles, and when you arrive, turn on the switch and say a few words casually." ”

"My lord, then let's go?!"

The four girls were full of joy, took the walkie-talkie, and set off immediately.

Looking at the back of the fourth girl, Lin Zifan also smiled.

I've tried face-to-face tests and can make sound, but now the question is whether the walkie-talkie made by my group can transmit sound for miles like a normal walkie-talkie!

Not much......

Zizizi......

In the walkie-talkie, there was a burst of electric sound, and everyone's eyes widened instantly, and they even held their breath.

It seems that the sound of his own breathing will make the sound in the walkie-talkie disappear.

"Uh...... My lord?"

In the intercom, a voice came out......

"Became !!"

Xiong Chumo and the other women instantly cheered, their faces were shocked and happy, and they were excited!

Although, this is only the original generation of walkie-talkies, although, in Lin Zifan's opinion, this pair of walkie-talkies is extremely simple, and there is even only one channel, which cannot be tuned......

However, this does not hinder their excitement and joy!

Miles away, can you talk normally? What is this? This is an artifact!

"Can you really talk?"

Obviously, hearing the cheers of the women on the walkie-talkie, the four women in spring, summer, autumn and winter over there were also startled.

"And, so clear!"

"I even heard the sound of iron eggs grinding their teeth......"

"Phew, you're just grinding your teeth!"

"Hee-hee-hee......"

The sound of the women chirping, as soon as people listen to it, they can imagine a group of warblers and swallows, surrounding Lin Zifan......

"Quiet ......"

Lin Zifan waved his hand and motioned for everyone to be quiet.

"What I'm going to say is...... We've made it!"

Lin Zifan's face was serious, and everyone thought he was going to say something, but the next sentence made everyone smile excitedly.

Especially Xiong Chumo......

At the beginning, she was in the Ministry of Industry, and she was ostracized, and they all felt that she was studying strange and tricky skills, which was useless.

But now, under the leadership of Lin Zifan, they have made such artifacts, this ...... How amazing???