Select the largest possible buffer cache tachograph what use can bring smoother video and better memory card compatibility. This refers to the night vision night vision effect refers to the product tachograph low light performance with electronic dog, not the kind of excellent products with LED light and infrared light, and then a strong fill light nor two car headlights on, simply not shine on the road, and according to the formation of reflective glass front, tachograph seriously affect vision video clarity, nothing fundamental role. Remember that with a fill light products come from the hands of the cottage manufacturers, just to hype the product of more than a gimmick to fool buyers do not understand the truth has been. Purchase at the time of purchase needed goods parametric analysis, analysis of the shooting angle, video resolution, compression format, caching, video can be manually turned off if an emergency video, do not interfere with other automotive electronic products, whether with cards and so on. Cottage shielding measures are not taken to reduce the cost of product design any screening measures, there is no rigorous testing, will interfere with GPS navigation, remote control, radio, tire pressure gauge and trip computer and other auto electronics products, the impact in the event of the situation is huge. Whether as a result of the tachograph card with a recorded video file is very large, high-definition, as the double edge of the screen shots to reduce distortion (Source: Network) frequency of up to hundreds of megabytes per minute, nearly, so the memory card write speed with demanding requirements. Low-calorific tachograph card is the Assembly lead to crashes. Domestic commercial flash memory card cohabitation, the same kind of card, high quality chip can operate repeatedly erase more than easy to buy the latest tachograph, intelligent tachograph. After receiving the results of the tachograph, can have a variety of conditions to try to look at the tachograph, test well, use it more safe and secure. 100000, inferior only about 2,000 times. General recommendations friend with original genuine buyers CLASS6 more cards. What is the use tachograph, tachograph, Grand Dragon car audio provided by the Zhengzhou Dragon MG Car Audio Limited. MG Car Audio Co., Ltd., Zhengzhou Dragon (www.888ltj.com) strong, credible, in Zhengzhou, Henan electronics, electrical products and other manufacturing equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Grand Dragon car stereo and you hand in hand into the brilliant, for a better future!