Preface The 660 is an innovative full-featured satellite positioning terminal. In addition to the essential functions of traditional handheld satellite positioning terminals, such as coordinate display, point-line-area data collection, and navigation prompts, it also has advanced features such as voice intercom and location sharing. It is suitable for team outings, group mountain climbing trips, and its main functions are as follows: 1.Track: Record the user's actual route for assisting navigation. 2.Route: Import GPX format routes through a computer for assisting navigation; users can also create routes themselves. 3.Waypoint: Record multiple waypoints for navigation. 4.Location Information: Provide accurate position coordinates, supporting various coordinate systems such as longitude and latitude, Beijing 54, Xi'an 80, National 2000, MGRS, etc. 1 5.Travel Information: Display speed, distance, and other travel data. 6.Sensors: Built-in electronic compass, barometric thermometer, and other sensors. 7.Maps: Support GIS data, offline maps, etc. Provide open-source map-making tools for users to create road traffic maps, topographic maps, satellite maps, and other types of maps. 8.Location Sharing: While making a call, send location information to view the location of your companions in real-time. 9.Display Settings: Users can customize the display settings according to their preferences. 10.Location Upload: Locations can be uploaded in real-time to backend servers. 11.Export CSV: Waypoints, tracks, and routes can all be exported in CSV format. 12.Export SCR: Can be directly opened and used within CAD software. 
Explanation PPT Zoom in Page flipping Marking Exit Confirmation Directional keys Zoom out Menu Go-to Power button 6 1,Diagram Menu 7 2,Function description
Power : Press and hold to turn on or off the device, and press briefly to adjust the volume and screen backlight brightness.
PTT : Voice and location send button. Press briefly to send location information, and press and hold to send voice. When you release the button, it sends location information.
Confirmation : Confirm to enter a certain interface or confirm to save modifications.
Exit: Exit the current screen until you return to the main menu screen.
Directional keys: Move the cursor up, down, left, or right.
Marking: Mark the current location information as a waypoint.
Go-to : Switch to the data management screen.
Menu : Pop up the function menu related to the current screen.
Page flipping : Used to switch the user-set jump interface. 
Zoom in, Zoom out : Used to zoom in or out the map in the map screen. In the waypoint screen, used to switch the sorting method. Chapter Two: Getting Started for Beginners 2.1 Power On 2.2 Power Off 2.3 Adjusting Screen Backlight and Volume: The screen backlight and volume both have five levels of brightness, with the default setting at medium backlight and high volume. To adjust the brightness and volume, press the power Press and hold
the Power butto for about 2 seconds to turn on the device. While the device is on, press and hold the
Power button for about 2 seconds to turn off the device. 9 Figure 2-1 Boot screen 10 2.4 System Status Bar at the Top of the Screen: button briefly to bring up the sound and brightness slider. Use the up and down buttons to adjust the volume, and use the left and right buttons to adjust the brightness. Note that the higher the brightness, the more battery power will be consumed. The system status bar is located at the top of the screen and displays information from left to right, including signal strength, date and time, and battery level. 2.4.1 Explanation of GPS Signal Strength Signal strength Explanation 1 Full signal (5 bars), most accurate positioning 2 Four bars of signal 3 Three bars of signal 4 Two bars of signal, 3D positioning 5 One bar of signal, 2D positioning 6 Not yet located 2.4.2 Date and Time The date and time on the device are obtained from satellite signals, so the device needs to be located first in order to display the correct date and time. 11 12 Chapter Three: Satellites The satellite screen is used to display the status of satellite signal reception. The numbers and bar graphs represent satellite numbers and signal strength, with green indicating participating in positioning and red indicating not participating in positioning