Since attending the WAR3 local group match at the Internet cafe in 2008, the sophomore year has passed after nine months of being planted by the athletes. During this period, various low-price mice of Razer were used almost every time. Golden snakes, demon snakes, mad snakes, pythons, and too climbing. . Although several Logitech and steel mills have also been used in the middle, I still have a soft spot for Razer's pythons. It's best to say that it suits himself. The third python was used for five years. The third python has also double-clicked recently. It has to take out the 6.18 inventory last year. Then wait until the end of the year to buy fretting on the Internet to save the old mouse that has failed.
Razer Purgatory Viper 1800DPI "Counter War" Collector's Edition Wired Gaming Mouse Silver 159 yuan Jingdong direct link 
The mouse was also bought under the guidance of Aunt when it was 6.18 last year. With coupons and payment discounts probably less than a grandfather to start with, this price will also buy a mad snake before, and now you can buy boa. However, after buying it, it was found that it could not be used. The mouse was too much at home, and it had been opened until now. . .
Out of the box
First of all, let's talk about this mouse wrapper. In the past, when Viper first came out, there was only one version of the package. That was the 3500DPI version. There will be too many later versions. There are more than a dozen versions, but most are simplified versions. For example, I started this counter-war version, the resolution dropped from 3500DPI to 1800DPI (and mad snake a level), canceled the side key, the wheel is not transparent, and the packaging grade has also declined. But the most important point is that the mold is the same and the hand feels the same.
The bottom of the box, the marriage relationship with Tencent, and the authenticity of the label.
At the top of the box, there is still a two-year warranty. I personally experienced Razer's after-sales service (the first viper had been double-clicked for less than two years, and he took a try and contacted Razer's after-sales service to complete a replacement through express delivery), although it was still inhumanized. The place exists, but the two-year replacement sale is still very safe.
Open the packing box, inside is a copperplate paper specification and mouse body, the packing is very simple, support simplified packing!
Shake off a sticker from the instruction sheet. This sticker was once a popular item in the dorm room. I don't know where to post it and time flies. . .
Razer's cloud-driven management, personally think that is not meaningful for ordinary players.
Contrast with the old version of the python, the anti-war version canceled the side key. For me, the impact is not great. This side key I just use for forward and backward when browsing the web. .
The most important point has been forgotten that this mouse does not use the traditional skin-like layer of the lamp factory, but the same smooth material as the mirror version. This question is a matter of opinion: The advantage of skin type is that it will never slippery in normal use. The disadvantage is that it takes a long time to use and it is difficult to clean up. The characteristics of the anti-war version are just the opposite, but after my trial, this smooth python can also feel.
The two pythons are exactly the same size, with only one difference from the top: the scroll wheel. The roller of the anti-war version is obviously not a light guide material, and it has shrunk on the scroll wheel, but the problem is not serious. In terms of grip, the wide mouse backboard provides very good support, with the exception of slight differences in surface material, which is the most important reason why I chose the python.
The bottom of the close-up: the new resolution is 1800DPI, the old model is 3500DPI, there is also a physical key to adjust the resolution, the old models can be adjusted in three steps, but the anti-war version can only be adjusted in two steps
There are also differences between the plug and the line, the old models have gold-plated plugs, the counter-war models are common plugs, the old models are braided lines, and the counter-war models are ordinary leather cords.
The color version of the anti-war version is silver plus white, used to seeing the Razer's blue light green light, in fact, the white light is also good to say.
After an afternoon of use, the resolution of the new mouse is half that of the standard version. However, the key feel and grip are close to the original, and the sliding sensitivity is basically the same at the highest level. Although the anti-war version of the snake has a lot of reduction compared to the original, but compared to the original price, this counter-attack version of the snake with a cost less than 100 yuan is still worth recommending.
Variable Frequency AC Power Supplies
The VFP series AC Power Supplies are high precision, high efficiency, low THD adjustable AC power supplies that converts the input mains power through AC→DC→AC conversion, and gives a pure sine wave AC output with adjustable voltage & frequency within a certain range. Also known as Variable Frequency AC Power Source.
According to the difference in the number of output phases, it can be divided into single-phase and three-phase AC power supplies.
The output power of single-phase adjustable AC power supply ranges from 500VA to 200KVA, the output power of three-phase adjustable AC power supply ranges from 3KVA to 600KVA, the output voltage is divided into 0 ~ 150Vac, 150 ~ 300Vac, and the output frequency is adjustable from 45Hz to 70Hz with 50/60Hz fixed frequency output.
Through the friendly operation panel, you can read the output data such as output voltage, output current, output power, power factor, etc., providing accurate data records for your test, and can add RS485 interfaces as standard, following the MODBUS-RTU international communication protocol, which can realize remote control and operating status monitoring of the power supplies.
This series of adjustable AC Power Supplies have comprehensive protection functions, such as: over voltage, over current, over temperature and short circuit protections, which can protect the AC power supplies and DUT from damages. At present, it is mainly used for Various electrical appliance manufacturers conduct grid simulation tests on electrical appliances according to the voltage/frequency requirements of different countries. Imported electrical appliances are used for the domestic demand for variable voltage and frequency conversion, as well as various AC motors and AC transformers.
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