QWinOut 67X33X21mm GPS Speed Speedometer Built-in LIPO Battery for RC Airplane FPV Racing Freestyle Drones DIY Parts

Product Description This product is based on GPS module data, mainly used for outdoor moving objects piggyback speed measurement, wide application scenarios, simple operation, easy to use.   I. Product features 1, The product has built-in lithium battery, full charge can be used continuously for 4 hours. 2, This product can provide you with the following data. (1) Fastest speed (data will be locked) (2) Real time speed (updated in real time) (3) Number of GPS satellites (4) Number of GPS messages   Product Specifications. Size:67x33x21mm Weight:43.5g Two, use method 1, the speed meter will be placed in the test object, installed firmly, GPS module up, and there should be no metal objects to block, turn on the power switch, wait for the GPS star search, when the number of satellites reached 7 or more, that is, you can start speed measurement. When the number of satellites reaches 7 or more, you can start to measure the speed. It takes about 3 minu