Tencent Digital (Zhou Shuo) On October 12, Optoma's autumn new product launch announced a full range of laser home projectors, laser televisions, laser engineering projections, and 4K projection new products. Among them, the new laser projection product ZH33, which was priced at RMB 11999, showed a relatively strong competitiveness in the same class of products, and is worthy of attention from mainstream home users.
Last year, laser light projectors began to gradually heat up in the market, and laser light sources gradually spread from the industrial sector to the general household market. Although compared with traditional light source products, laser light source products generally have higher prices, but laser light sources have the advantages of good color performance and long service life. This time, the Z33 laser projector released by Optoma this time set the price at 11999 yuan, no doubt once again lowered the price of the laser light source, giving a strong pressure on similar competing products.
The heavyweight Optoma Z33 released this time has 118% HDTV color gamut in color, and the actual perception is relatively good. Can achieve more than 20,000 hours of service life. Built-in SRS surround Speaker system can create a better sense of the scene and enhance the stereo sound effect in the space. On the lens side, the product supports 1.36x zoom and can project 100-inch screens within 2.4 meters. Compared with the Z33, the elite version of the Z55 is more advanced in terms of color processing. It can highlight objects in the motion picture and increase the screen level and sensitivity. Built-in smart Ali cloud OS operating system, richer content resources.
Optoma also brought a reflective ultra-short-focus laser television, including the LCT2 and LCT110, which can project a 100-inch picture at just 60cm. The brightness of LCT2 reached 4000 lumens, and the brightness of LCT110 reached 3,500 lumens. Compared with the previous generation, the picture color performance and clarity have been improved.
It is worth mentioning that LCT2 has 5 built-in wall color compensation functions, which can automatically adjust the color of the display screen according to the color of the wall, fill up the color deviation, and achieve correction. This is undoubtedly a very practical function. The LCT110 has a built-in MEMC function that also enables vivid three-dimensional images. At the same time, it is equipped with Aliyun OS system, and the content resources are guaranteed.
In addition, the new products released this time include ZU850 project projection, ZU510T, ZX510 two entry project projections, but also worthy of relevant user attention.
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A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire trucks. There are two general types: pneumatic and electronic.
Many fire sirens (used for calling the volunteer fire fighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire
sirens are either mounted on the roof of a fire station or on a pole
next to the fire station. Fire sirens can also be mounted on or near
government buildings, on tall structures such as water towers,
as well as in systems where several sirens are distributed around a
town for better sound coverage. Most fire sirens are single tone and
mechanically driven by electric motors with a rotor attached to the
shaft. Some newer sirens are electronically driven speakers.
Fire sirens are often called "fire whistles", "fire alarms", or
"fire horns". Although there is no standard signaling of fire sirens,
some utilize codes to inform firefighters of the location of the fire.
Civil defense sirens also used as fire sirens often can produce an
alternating "hi-lo" signal (similar to emergency vehicles in many
European countries) as the fire signal, or a slow wail (typically 3x) as
to not confuse the public with the standard civil defense signals of
alert (steady tone) and attack (fast wavering tone). Fire sirens are
often tested once a day at noon and are also called "noon sirens" or
"noon whistles".
The first emergency vehicles relied on a bell. Then in the 70s,
they switched to a duotone airhorn. Then in the 80s, that was overtaken
by an electronic wail.
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