[ Huaqiang Security Network News ]
Introduction to the six precautions for walkie-talkie purchase:
Six precautions for walkie-talkie purchase
1, the classification of walkie-talkies
According to the type of communication terminal, the walkie-talkie can be divided into three types: hand-held walkie-talkie, car walkie-talkie (base station), and transfer station (relay station).
2. Frequency range.
Before selecting a walkie-talkie, you should first understand whether the walkie-talkie has a network access permit from the national radio management department. Secondly, we should understand the frequency of the work of the walkie-talkie. For example, the frequency range of the use of civilian walkie-talkies is 400~420Mhz.
3. Transmit power.
Transmit power is an important indicator of the walkie-talkie. It determines the talk distance, time of use and interference of other communication equipment. Therefore, when purchasing the walkie-talkie, you should know the transmit power of the walkie-talkie according to actual needs. The transmission power of the general civilian walkie-talkie is about 1W, and the launch power of commercial walkie-talkies and professional walkie-talkies is about 4W. (The state stipulates that the transmitting power of the handheld radio must not exceed 5W).
4, call distance
Often the problem of the distance of the call is always involved when purchasing a walkie-talkie. In fact, the distance of the call is related to the transmission power of the walkie-talkie and the use environment or network conditions. The general communication distance within 2-3 km can be regarded as short-distance communication. For individual users, you can purchase a civilian walkie-talkie. For the unit user, you can purchase a small power walkie-talkie by applying. If you want to ensure the communication effect, you can choose a professional walkie-talkie. Need to communicate within the city, communication distance is within 3-10 km, you can consider buying a professional walkie-talkie. If it is farther away, it is better to use the base station to communicate with the handheld walkie-talkie, or the radio station and the radio station communication base station. We can use the car radio with a relatively large output power. If you need a longer distance or better communication quality, you can consider using a cluster walkie-talkie if you don't have a network. Because the radio intercom is supported by the radio network, the communication distance is relatively long, and the effective distance reaches 15-30KM. This type of walkie-talkie requires network support, so once it is disconnected from the network, just like the mobile phone is off the network, even if the two sides of the call face each other, it cannot be called. .
5. The type and capacity of the battery.
The type and capacity of the walkie-talkie directly affects the use time and efficiency of the walkie-talkie. Therefore, pay attention to the type and capacity of the battery when purchasing the walkie-talkie. First of all, there are many nickel-hydrogen batteries and lithium batteries in the general market. Under the same volume, the nickel-hydrogen battery has high capacity and small memory effect. The use environment is: -30 ° C - 60 ° C, the price is moderate, the self-discharge rate is high, about 25%, and the weight is also heavier. The lithium battery has high energy density, large capacity under the same volume, and light weight, and basically has no memory. The use environment is: -10 ° C - 60 ° C, the self-discharge rate is about 6%, the price is more expensive than nickel-metal hydride batteries.
When purchasing the walkie-talkie, you should also pay attention to whether the battery is the original battery, and the marked battery capacity is sufficient. If necessary, you can use the instrument to perform a simple test on the battery to check whether the actual battery capacity matches the marked one.
6, warranty period and post-maintenance
At present, there are many walkie-talkie brands on the market, and the prices are different. The difference is very big. However, before purchasing the walkie-talkie, it is necessary to ask the seller for the warranty and post-maintenance of the walkie-talkie, otherwise it will cause unnecessary trouble in the later stage.

QB LED Grow Light

AGLEX QB LED Grow Light is with dimming knob, you could adjust lighting intensity as plants needs, providing them with favorable growing environment.

qb led grow light


K Series QB LED Grow Lights Features:


  • BOOM YIELD LED Grow Light, NEWEST SMD 3030 LED TECHNOLOGY - Bigger size, super bright high efficient upgraded SMD 3030 led technology provides highest PPFD output(2047umol/j of K4000), makes you get 30% higher yield compare OLD led lights, can get max yield at 2.5g/watt, less pay but get more yield, bring a amazing grow trip to any home grower.

  • FLEXIBLE 10-LEVEL DIMMING, VERY CONVENIENT - There is a dimmer knob built right into the grow light panel, featured to manipulate the light brightness and intensity at liberty from 0%-100%, provides desired needs for plants in all stages from veg to bloom. It is definitely very convenient when using it for vegging so you can turn it down on the young plants. In flowering, you just leave it on 100%, allowing plants flexibility to obtain perfect growth performance.


  • OPTIMAL SUNLIKE SPECTRUM, NICE ON EYES - Consist of full spectrum White 3500K 6500K and Red 660nm LEDs, infinitely close to natural light, providing everything plants desired in the natural sunlight. It's suitable for all plants growing stages, rapids plant response from seed to flower to harvest, increasing yield & crop quality. Uniform and wide-beam light distribution for your plant's optimal growth. No more red blue light. All sunlike spectrum, it's really nice on eyes.



  • WELL MADE & ENERGY SAVING & LONG-TIME WARRANTY- No fans zero noise. Large areas of solid aluminum heat sinks help you to achieve the ideal cooling system. Adopts high safety performance UL waterproof driver to achieve high PAR output, longer lifespan to speed up plant's grow processes and boost yields while saving you on your energy bill. Saves up to 80% energy than other led grow lights.


  • 3 Year Warranty. And Friendly In-time Customer Services.

  • K4000 has a special design - UNIQUE 180° FOLDABLE DESIGN GROW LIGHTS - Upgraded AGLXE K4000 LED Grow Light is foldable with buckles in the middle, easy to stretch out or fold up. It`s ideal for large area growing and commercial planting. Perfect coverage is 4x6ft. Both sides can be freely folded from 0°to 180°, convenient to install and save space, it also can be carried easily. No any worry about hurting hands and lamps but holding the drivers.



foldable led grow light qb

Dimmable LED Grow Light, Indoor Grow Light, 1000W Grow Light, Medical Grow Light, Best LED Grow Light

Shenzhen Ameri Technology Co., Ltd. , https://www.aglexz.com

Posted on