Based on what Feilong said, Wang Zhuo judged that the videos he was secretly filmed were very clear and should not be transmitted by analog signals.

With an idea, Wang Zhuo came up with a question: "If I want to record for more than three hours, use multiple cameras, require clear images, and shoot covertly, what should I do?" ”

"That's a lot to consider." Feilong snapped his fingers and said: "More than three hours, there must be enough power supply, a pinhole camera must have at least a thousand milliamperes of lithium battery, if the image is clear, it is best to use a flash memory card, if you use digital signals to transmit wirelessly, the receiving distance is very limited, and the power consumption is also large all of a sudden, relying on lithium battery power supply is not good." And the ...... of covert shooting"

He rambled a lot, Wang Zhuo understood it, and dared to love this kid for not doing his job, he pondered these things all day long, and when it came to related things, it was like a treasure, if he went to the electronic city to set up a stall to sell this, he was also an expert.

The two walked all the way and talked, and soon came to a leisure street on the bank of the Yellow River, which made Feilong a little puzzled, Wang Zhuo parked the car in front of a coffee shop, but took him to walk dozens of meters to a four-star hotel called Hongdao.

Brought Feilong to the front desk, Wang Zhuo asked for room 1116, and the receptionist inquired and told him that there was someone in the room and he hadn't checked out yet.

"What about the next room?" Wang Zhuo asked again.

After inquiry, the receptionist smiled politely and said, "Sorry sir, the guests of 1114 and 1118 are together with 1116, and they are all booked until the day after tomorrow." ”

"What about 1115 and 1117 on the other side?" The fat dragon interjected.

"There's no one in these two rooms," the receptionist smiled, "and if you want to check in, you can do it right away." ”

Wang Zhuo immediately nodded: "Okay!" We want 1115. ”

"Sir, is it just a 1115 room?" The receptionist felt the need to make sure, as these rooms were all double beds and did not seem to be suitable for two men.

"Yes, I want one." The fat dragon nodded to her.

The receptionist didn't care, maybe these two opened the room for someone else's use, or only one person stayed in, whatever?

"Oh yes, just open a three-hour hourly room." A certain miserly billionaire added.

After opening the room with Feilong's ID card, the two went upstairs with the room card, and the three receptionists looked at each other, saying in their hearts Are these two really the legendary Blizzard men, glass slag?

Wang Zhuo and Feilong didn't know that when they opened a room, they were mistaken for glass, and after the two arrived at 1115, Feilong opened the door, and Wang Zhuo went to knock on the door of 1116.

When he was going through the formalities downstairs just now, he had already seen with his perspective that there were three middle-aged women in room 1116 playing poker against the landlord, so he asked to open the hourly room. If 1116 has no one, he will have to wait for the rabbit, I don't know when.

As soon as the three aunts opened the door, Wang Zhuo lied that he had lost something valuable, which might have fallen in this room, and at the same time took out 600 yuan, saying that he was inviting the aunts to have a light meal, which would only take two or three hours.

Six hundred yuan is really not a lot for the aunts who can afford to live in a four-star hotel, but since the handsome little guy who begged for it showed sincerity, the aunts were also happy to be convenient with others, so they took out their things and moved them to the next door, told Wang Zhuo to hand over the room card to the front desk after using it, and went downstairs to go shopping.

The three aunts were invited, and the two entered the room, Wang Zhuo turned around and locked the door and tied the security chain again.

"I see!" Feilong laughed in a low voice: "Is there anyone who often lives in this room, and you want to take pictures secretly, so take me over to step on the turf first, and then prepare tools?" ”

Feilong's guess is really reasonable, but it's a pity that his starting point is to secretly photograph others, so the conclusion he came to is a thousand miles wrong.

"Here, here, this, this!" Wang Zhuo ignored him, directly pointed to four places, and said in a low voice: "Pinhole cameras have been installed in these four places before, but they may have been removed." We have three hours, you help me find clues, see if I can follow the vine and find out the person who took the candid photo. ”

Feilong suddenly realized that his guess was completely wrong, this trip was not to secretly photograph others, but to be secretly photographed by others, to find clues!

This fat guy immediately became excited, the criminal investigation reality show, it's so exciting!

At this time, Wang Zhuo had already moved the table to a corner of the room, put the chair on it, climbed on the chair, and took off the smoke detector.

The smoke detector is a small disc-shaped electrical appliance with a ceiling-mounted structure, which is installed for fire alarm, and has a certain degree of circuit facilities in it.

Feilong immediately asserted: "This is the entry contact of two hundred and two, these two sections of wire head are soldered back, it seems that the pinhole camera is installed here!" ”

Wang Zhuo asked: "In other words, this pinhole camera is externally powered and uses the room's 220-volt power supply?" ”

"That's right, someone has installed a parallel line at the power inlet of this smoke sensor, as long as this smoke sensor is powered on, this pinhole camera can continue to work!"

"How much time can one of the largest memory cards record?" After a deep groan, Wang Zhuo asked.

Feilong glanced at him and said with a wry smile: "Boss, I have to see the video file to analyze it." ”

Wang Zhuo hesitated, shook his head and said, "Then you tell me about the situation, and I will analyze it myself." ”

"Let's put it this way," Feilong said: "The most common pinhole device on the market, recording an hour's video, requires about 1 and a half g of storage space, the camera I gave you is like this, you first compare the clarity of the video and tell me, and I will help you analyze." ”

"The two are about the same, but the video resolution recorded in this room is more fine, and some are close to the shooting effect of brand-name mobile phones." Wang Zhuo said.

"Then the pinhole camera used here is more advanced, and I guess there is a device that can be one of the two solutions." Fei Long didn't explain what the plan meant, and continued to analyze: "If someone is secretly recorded in this room for more than three hours, there are already a lot of clues. ”

"Go on." Wang Zhuo nodded, and went to look at the other two places where pinhole cameras were hidden, namely the TV and the air conditioner.

Because he came prepared, he touched the back of his waist, took out a small electrician's bag, turned the TV at an angle, and began to disassemble it with a Phillips screwdriver.

"Now there are two possibilities, one is that this smoke detector is installed with a self-recording system, as soon as there is activity in the room, its motion detection function is activated, and it starts to record video, and after the people in the room are still, it stops working. If you use a 16G flash memory card, you can record more than ten hours of video, and if no one occupies in this room, there is no waste of storage space, and you can record for one to three days if someone lives in it. ”

"Motion detection? Is this feature advanced? Wang Zhuo frowned.

Feilong smiled: "Just add a few small programs to the chip, for a pinhole camera, the cost is almost negligible." ”

"If you use a 32 or 64g card, wouldn't you be able to record for a week?" Wang Zhuo asked again, this is related to the difficulty of catching thieves, and he must understand.

"That's right, but there is only one chip scheme that supports more than 16G cards, and it is not too stable when it works, so it can be surnamed." Feilong smiled and said: "And the 32g or 64g card is not cheap, it is estimated that four cards will cost thousands of yuan, besides, the person who secretly shoots may not only have this one hook, if he uses a few more sets of this equipment, the cost will be too high, and there are other troubles." ”

"What's the trouble?" Wang Zhuo asked, putting aside the back cover of the removed TV.

"Hey, boss." The fat dragon said with a slanderous face: "You tell me honestly, did you open a room with a girl here and was secretly photographed?" ”

"Go on, what's the trouble?" Wang Zhuo gave him a tacit acquiescence.

Feilong shook his head proudly and said: "The trouble is that if you use a flash card to record video, you need to disassemble the equipment to know if you have caught a fish, so you need to stay in this room frequently, and it is easy to show your feet!" ”

This fat man has a lot of brains! Wang Zhuo glanced at him approvingly, and encouraged him to continue with his eyes.

"Moreover, judging from the location where these candid camera equipment is installed, it is definitely done by professionals, such professional people, they must have professional technical strength to match, so they will definitely not use flash memory cards, but must use wireless signals to transmit!"

At this time, the internal organs of the TV have been shown in front of the two, or on the solder joints at the power supply, there are two close cut marks, and under the screen of the TV, a depression in the shell, someone has pierced a small hole with a hot needle, and the position is just right hidden at the lower edge of the screen, looking from the front of the TV, it is not noticeable at all.

"I see!" Wang Zhuo pressed the screwdriver on the table, his eyes rolled sharply, and analyzed: "Since these candid shooting equipment uses the existing power supply lines in the room, they don't care about the power consumption of the transmitted signal, and just like you said, if you use a flash memory card to take candid photos, you must frequently enter and exit this room, then only the inner ghost can do it, and it is easy to show your feet, but if you use a wireless signal, you can do it once and for all, when you receive a valuable wireless signal, it is not too late to blackmail!" ”

"I really didn't think of it just now." Feilong high-fived himself and said excitedly: "If it is the hotel's internal personnel who install these things, you can really use a flash memory card!" ”

"The wireless signal can't travel far, right?" Wang Zhuo is most concerned about this issue.

(To be continued)