Portable Walkie Talkie With Flashlight JS-680

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Min Order Qty:
10 Sets set
Supply Capability:
500 Sets Per Week set/month

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Specification of Portable Walkie Talkie With Flashlight JS-680

 

General

Frequency Range 

400- 470MHz

Channel Capacity

16

Operated Voltage

7.4V

Battery Capacity 

H-1500 MAh Li-ion

Battery Life(5-5-90 duty cycle)

About 10 Hours

Frequency Stability

±2.5ppm

Operated Temperature

20℃-60℃

Antenna Impedance

50Ω

Dimensions

97.36mmx57.2mmx29.3mm

Transmitter

RF Power Output

5W

Modulation

F3E

Spurious Emission

65dB

FM Noise

45dB(W) /42dB (N)

Audio Distortion

5%

Transmitting Current

1.2A

Receiver

Sensitivity (12dB SINAD)

0.20μV

Intermodulation

65dB

Adjacent Channel Selectivity

60dB

Spurious Response

60dB

FM Noise

45dB(W) /42dB (N)

Audio Distortion 

5%

Accessory

Battery/Antenna/Charger/Belt Clip

 

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Portable Walkie Talkie With Flashlight JS-680

 

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Portable Walkie Talkie With Flashlight JS-680

 

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Portable Walkie Talkie With Flashlight JS-680

 

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Portable Walkie Talkie With Flashlight JS-680

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Q:Seeking the similarities and differences between RTK and GPS
GPS: is the satellite positioning system in general, narrow sense refers to the GPS satellite, and the narrow sense refers to all can receive GPS signal equipment; RTK refers to the dynamic real time difference measurement, it also refers to the difference can be used for real-time dynamic measurement equipment. The difference between the two measurements from speaking: GPS contains RTK, also includes some precision lower grade equipment, such as the Garmin handset, handset, GPS meter level navigation etc..
Q:What is the difference between professional GPS handsets and mobile navigation?
First of all, if used outdoors, then fell, and so on are likely to water, and this thing is also very expensive, so the opportunity to have a high professional anti shock waterproof performance. You can see the Challenger I tour the next 600, three well plates.
Q:GPS method for highway survey?
For long tunnels, the conventional measurement of large bridges has the following limitations:1, long tunnels, bridges and other structures generally require the measurement level of four or more. With conventional measurement methods, often adopt the measure to increase the number of methods to extend the observation time, time consumption and labor consumption to try to improve the accuracy of.2, the long tunnel and bridge for the complex terrain region difficult, conventional control measure for visibility and network shape, often cut down the workload is quite large, so the measurement of the cost of a large, hard work.Link control network of high precision 3, long tunnel and bridge and low precision and route network, although with adjustment methods can be overcome, but because of the terrain conditions are difficult, the measurement workload to its connection, and is not too easy. In practical work, the control of the structure and the measurement of the route are often out of touch.
Q:Handheld GPS and mobile phone GPS what is the difference?
Different: antenna size, function, accuracy, protection level, and has been different in the application layer (handheld GPS support GPS compass navigation and map navigation and other more professional GPS applications);
Q:I would like to ask the GPS handset and GPS receiver (Surveying and mapping qualification application needs) is there a difference?
1. GPS is a geodetic instrument, with an accuracy of CM, generally for the millimeter,,Divided into (1) pure static type, such as the South Star of the North Star, the accuracy of mm, now the basic domestic,,(2) RTK, RTK can do is use, carrier phase measurement, the precision is cm level, RTK mobile station must have the control hand book, like television and remote similar, but now there are a lot of hand book can be used as handset2. The handset is generally rough field positioning equipment, navigation for mobile phone use, the general size, precision grade m, now can to about 20cm, and can be used for RTK mobile station use (need to access the base station) can reach cm level.Surveying and mapping qualification applications require geodetic measurement equipment, that is, 1.Now domestic GPS, such as the Haida, the south, China, etc. can be measured, not expensive
Q:What is the difference between a hand-held GPS and a car's onboard navigator
As the first floor of a friend to answer the same, the general application of hand-held devices in land surveying, mountain climbing and other precise positioning when measuring the use of. Long standby time, three good performance. Easy to carry. A single charge can be used for a long time (depending on the machine). Although navigation, but the map is not detailed. At the same time, there is an opportunity to have latitude, latitude and other information.The car navigation is designed for users to drive out, in the field when not familiar with the road, ah, not familiar with the surrounding buildings, such as parking, hospitals, restaurants, gas stations. Used. Map details. But does not provide information such as latitude accuracy. No elevation.Look what you're doing. There is also a mobile phone navigation function.If you are purely for entertainment, then choose the phone.If you want to navigate in the car, select the vehicle navigation.If you are a very professional outdoor sports enthusiasts on the choice of handheld.
Q:What do you need to test for GPS?
As a high-tech product, GPS has a very complex technical parameters. However, as people's living standards improved rapidly, more and more ordinary people began to pay attention to the positioning and navigation tools originated from the military. Because the convenience it brings is unprecedented. In order to let everyone out of all the technical parameters of GPS receiver, no longer confused at the time of purchase, the author selected six of the most important technical indicators, one by one to explain to you. 1 parallel channels on the market most of the GPS receiver is a 8 channel, 12 channel, the 16 channel, which allows them to continuously track the information of each satellite. Some GPS devices only have 2 to 5 parallel channel receiving satellite signals, because the average of 8 satellites are visible, which means that the GPS receiver must visit each of the satellites in order to obtain information about each satellite. All of our products are in Shenzhen channel 16 channel, multi-channel parallel GPS receiver, including the advantages of rapid cold start and initialization of satellite information, but also in the forest area can have a better reception. General 12 channel receiver does not require an external antenna, unless you are in a bad environment conditions such as closed space, such as the cabin, the car. 2 the sensitivity of the GPS satellite signal to the ground has been very weak, as well as ground wireless communication clutter interference. The lowest traceable signal strength of the GPS receiver determines how much useful signal is received. A GPS receiver with a lower minimum tracking signal strength has a higher sensitivity, and can receive more available satellites under bad conditions
Q:Trouble Hongkong friends come in! About Hongkong buy handheld GPS!
Specific model depends on what you are doing, almost two thousand or three thousand of the words can be. Good point is four thousand to six thousand.
Q:How to hand GPS eTrex H data to the computer
"Shaanxi skmax navigation information Limited" GARMIN proxy (GARMIN official website can be found), contact (Xiao Hou) the hope can help to you, if you do not understand what we see on the Internet, may at any time, contact us!
Q:Mobile GPS can replace professional handheld GPS
No, professional signal and positioning more accurate,Walk along the plots in a circle can measure the size and graphics trajectory, 550 yuan, USB charging, large capacity lithium battery, black and white screen to see the clear day for outdoor use.

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