Jiayi brought his eye armor to the front of the sonar detector, took out a disc and handed it to him.

The sonar detector has been successfully made for a long time, but the best thing is to use the eardrums and wings of the big-eared magic bat as materials. This thing is rare, and the most important thing is that it is not sold on the market, so you need to place an order and purchase it yourself. Therefore, this version of Jiayi has also been improved.

On the way here, Kazui kept modifying the design and looking for materials that could replace the eardrums of the big eardrum of the magic bat. Finally, when he arrived in Beishui City, he found a kind of hai silver. This thing is similar in properties to mitril. Although the effect is far less than that of mitril, its ductility is very excellent. After special annealing treatment, its toughness and rigidity are excellent, achieving a nearly perfect balance.

After using the diaphragm to make the diaphragm, although it is not as good as the eardrums of the Big Earing Magic Bat, it is also very excellent. This can be regarded as the third generation, with the most perfect balance of economy and performance at present.

The first generation was Jiayi himself, using the eardrums and wings of the big-eared magic bat as materials. After his improvement, it can now not only be used as sonar detection, but also to detect the surrounding magic fluctuations, which is much more sensitive than the mage himself. The second generation was handed over by Jiayi to the Valoca Chamber of Commerce, a large-scale mass production version. This is the first version, but the diaphragm that accepts sound is average in quality and has the worst effect, but it can be used, and it is cheap. The third type is now launched by Jiayi, using the latest diaphragm, with the effect and price in the middle.

Jia Yi introduced the function of the sonar array plate to Miaojia. He heard Miaojia's eyes shining. If you have this on the way back, it will definitely be smoother. At this time, it is not peaceful. Miaojia's family is also far away from here. Even if a mage crosses mountains and ridges, crosses lakes and rivers, he will inevitably encounter water ghosts and monsters. Although there is no major danger, it is safer to discover it in advance.

Seeing that he was a little moved, Jiayi continued to introduce: "Brief mages like us have limited active detection methods, but they are inevitably able to enter the mountains, wilderness to go on missions. With this, it is much safer. Moreover, this can also detect underwater conditions and avoid dangers in unfamiliar waters. You must know that for mages, underwater is an unfamiliar existence and it is easy to have sudden dangers."

"Your this is good, but it's much more expensive than the ones in the Valoca Chamber of Commerce." A mage next to him said. Obviously, he had already understood the price, and had also seen sonar detectors at the Valoca Chamber of Commerce.

"How much does this cost?" Mou Jia asked. As a mage, he shouldn't be too short of money in theory, but he was originally in a remote place, so he was not rich and was a little sensitive to the price.

The mage said: "It costs 160 gold here, and even if it is discounted, it costs 136 gold. However, it only costs 50 gold at the Valoca Chamber of Commerce, which is more than doubled."

"That's because our sonar is better, with a longer distance and higher accuracy, and there is no problem with the jungle. If theirs is in the jungle, the detection distance will be much shorter." Jiayi explained, "You should know that in many cases, you will have more chances to deal with the danger earlier, which is not comparable to dozens of gold coins."

Eye armor nodded silently.

Sometimes this is the case, which may be just a very high performance improvement, but it will cause the price to double. The two are not proportional, but are more often exponentially correlated.

Jiayi continued: "But in fact, you don't have to buy it in such a hurry, because school is just starting now and you don't have the chance to go outdoors, so you can wait until the semester is about to end before buying it."

"Hey, what's going on with you? Others want customers to buy things. How do you push customers out? Do your boss know?" Another mage said angrily.

Jiayi said a little, "Well, I am the owner of this store, well, one of them. The main reason is that our store is too hasty, so the stock is not very sufficient. If you continue to sell it, there will be no things on the shelves. You see, our store is relatively small and didn't plan to do too big business."

“So that’s what it is…”

Regarding Jiayi's frankness, some people around him felt that the first time they opened a store and the school season was also met. It is understandable. Some people think that since they opened a store, they were not ready and were still reluctant to sell goods, which was simply a fraud. However, everyone was a mage, so they complained for a few words and did not say anything too much.

The school season is actually a carnival for those big chambers of commerce. It is normal for small shops like Jiayi to be out of stock, because they cannot invest too much money to prepare too much goods, otherwise the products cannot be sold and the money will be stuck there. If the school season cannot be sold, the price of reselling to a special chamber of commerce will be much lower, and you have to sell it, otherwise the goods will be backlogged and even the funds will be trapped, and the losses will be even greater. But like Jiayi, it is the first time that the goods have been prepared so little. Before noon arrives, it is almost sold out, so everyone guesses that it is dissatisfied.

Jiayi expressed a few apologies to the people around him, then he walked to the counter and climbed up to the counter. After attracting everyone's attention, he took out a stack of coupons and said, "Originally, I will give you 15% off for everyone to open today, but the stocking is really insufficient, so I send these coupons to everyone. With these coupons, you can get 20% off for any item next time you buy, and it will be valid until the end of the semester."

Although it is 20% off, which is a little more than 25% off, and the term is quite long, he changed to only one product to be valid, and this morning he temporarily adjusted the price and doubled it. If these coupons can win over these customers, they will make a lot of money even if they are discounted.

Fortunately, the customers here are reasonable. After all, everyone is a mage, and they are a bit proud of their identity and will not make unreasonable trouble. Moreover, Jiayi has publicly expressed his apology and made compensation, so it is difficult for them to continue to pursue it. Everyone is a mage, and they will have to date in the future. It is not good to offend too deeply. As for those who are not mages, they do not have the qualifications to speak.

When Jia saw that everyone was quite satisfied with the coupons, they almost received the coupons. Even if a few of them didn't receive them, they didn't say anything strange, so they couldn't help but breathe a sigh of relief. The out-of-stock incident was fooled first.

This batch of coupons is just made by Jiayi. It is the carved plate of the printed flyer, which is painted with ink marks, and then stamped with the secret key in Yangxi's own mage badge. After signing, a coupon will be made. Of course, the mage's secret key can be cracked, but people with this ability will never use it to fake Jiayi's coupons, and they can't afford to lose this person.

"You deceived everyone, do you want to send everyone out just these so-called coupons? They said they were opening and reward guests, but they were out of stock, so they could only send these coupons. What's the use? And your potions and the Chester Chamber of Commerce logo on them were not erased. This is not your own goods, right? Is it the way to put other chambers of commerce goods in your own store to sell? You are playing tricks on everyone."
Chapter completed!