Portable Walkie Talkie With Flashlight JS-680

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China Main Port
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TT or LC
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

 

Application of Portable Walkie Talkie With Flashlight JS-680

 

Portable Walkie Talkie With Flashlight JS-680

 

Certificates of Portable Walkie Talkie With Flashlight JS-680

 

Portable Walkie Talkie With Flashlight JS-680

 

Workshop of Portable Walkie Talkie With Flashlight JS-680

 

Portable Walkie Talkie With Flashlight JS-680

 

Testing Equipments of Portable Walkie Talkie With Flashlight JS-680

 

Portable Walkie Talkie With Flashlight JS-680

 

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Portable Walkie Talkie With Flashlight JS-680

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Q:Fuxin coordinates with the mapping of the seven parameters are what ah
XYZ offset, XYZ twist, 6, plus a scaling factor.Seven parameters have to be calculated, or from the local surveying and mapping departments to.
Q:What do you need to test for GPS?
3 positioning time this means when you restart your GPS receiver, it determines the time required for the current position. For the 12 channel receiver, if you are in the last position near the location of the cold start time is 30 seconds to 5 minutes, hot start is usually 5 to 40 seconds, and for the 2 channel receiver, most of the cold start more than 15 minutes, hot start 2 to 5 minutes. The positioning accuracy of the positioning accuracy of 4 which is obtained in the case of no WAAS/EGNOS conclusion, rather than most of the GPS receiver specification of the positioning accuracy, can look at the test report of others so before the purchase of GPS, now on the market with 12 channel GPS receiver error level is generally not more than 30 meters, height error not more than 50 meters, the average error is about 15 meters. Due to the use of the module, our product positioning error is about 10 meters,
Q:The future of GPS? Who can tell me professional, humane business prospects,
6 people travel and adventure7 personal communication terminal (with mobile phones, PDA, electronic map integration)8 time synchronization of electric power, post and telecommunication9 accurate timing of admission10 accurate frequency of admission
Q:Hand held GPS coordinate conversion method
Three parameter test DX, DY, DZ, DA, DF after the conversion parameters of the five, must be prompted to enter the handheld GPS, while the input area of the central meridian longitude. E on behalf of the east longitude, projection ratio of 1, the deviation of things to the north and south of the deviation of 0, and set the unit for M. Enter these parameters, should be taken to the field test, check whether these five parameters are correct. The method is selected, vision, GPS receiving signal strength of the feature points in the field (such as linear object intersections, independent features, etc.) is the best stone control points were measured and compared with theory and find out the coordinates of these points. If the results of the comparison exceed the nominal accuracy of the instrument, the conversion parameters or the problems that should be found should be recalculated.
Q:I am a handheld GPS precision is low, how to use to be able to improve certain accuracy.
If you can join the CORS network, the accuracy of decimeter to centimeter level.
Q:Ask how to select a google satellite map into a handheld Area GPS
If an ordinary mobile phone GPS, can install Orville interactive map support pre download any regional satellite map, support for offline use.
Q:Professional GPS handheld and mobile navigation difference
Three, the map of the differenceIn terms of the difference between the two maps is relatively large, most of the hand-held machine using contour map, the city is only as a secondary auxiliary. The mobile map is just the opposite, very detailed description of the city streets.Refer toThere is no road for GPS routing calculation. Popular said, handheld GPS to do is to draw a straight line to the destination, to determine their own inflection point. Handheld GPS will tell you to the destination: distance, course, yaw distance and other information (a lot of parameters, you can choose to display). In addition, handheld GPS also has to add a new landmark, through the software to draw their own waypoints, the average position of the measurement function, and even can measure the height and temperature, highlighting the degree of professionalism of its application.Cell phone navigation is very different from the former. GPS will be in accordance with the routing algorithm to calculate the nearest path, the premise is to have a detailed street map. GPS will tell you the right to turn right at the intersection. Mobile GPS can also search the starting point near the point of interest information, and can calculate the fastest path to reach the land.
Q:Recommend a handheld GPS
At present, the formal channels genuine licensed not so cheap, some refurbished machines may have. The cheapest machines now have about 900-1000!
Q:Mobile GPS can replace professional handheld GPS
No, the phone's GPS is used for navigation, professional handheld GPS is used for measurement. Navigation GPS cannot be used for measurement because of insufficient accuracy.
Q:Jia Ming etre20 handheld GPS good
Jia Ming eTrex 20 has a microSD card slot and 1.7GB built-in memory space eTrex 20 allows you to store more user acquisition information, in addition to the map expansion slot, you can load the map of the global area of Garmin.

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