Changtian Technology is a high-tech product research and development company in Taiwan, involving business covering sports GPS, driving recorders, car navigation systems, smart heart rate watches and other fields, in the Japanese and American markets, Changtian is well-known. In 2005, Changtian officially entered Chinese mainland, compared with other brands of dash cam products, the biggest feature of Changtian is excellent digital image stabilization, which greatly improves the stability of the dash cam.
 
There are few long-day dash cam products,The positioning is not high-end,The output video resolution is1080P,The price is distributed between 300-700 yuan。 For dash cams with an output video of only 1080P, the most cost-effective approach is to directly equip it with a 2.1 million image sensor. The longsky dash cam is generally equipped with a 5 million pixel image sensor. Excess pixels can not only be used for digital image stabilization, increase the stability of the dashcam during driving, but also combine multiple pixels into one pixel to improve the level of image quality.
 
In terms of the power supply mode of the dash cam, there are two schemes for Changtian: polymer lithium battery or supercapacitor. The recorder does not store power for battery life, in the event of an emergency such as a crash, the recorder may not save the last video due to the loosening of the power cord, in this case, the dashcam with a built-in battery or supercapacitor can provide protection. These two solutions have their own advantages and disadvantages, polymer lithium batteries mainly store or release electricity through redox reactions, have high energy density but short service life, and need to be replaced once every 1-2 years. Supercapacitors, on the other hand, physically store electricity, and although the energy density is not as high as that of polymer batteries, they have a longer service life and can be repeatedly charged and discharged hundreds of thousands of times. In addition, polymer batteries will expand if the internal temperature is too high when they are continuously charged for a long time or exposed to high temperatures. At present, the entire dash cam industry has a trend towards supercapacitors.
 
Users who pursue night vision can choose the longsky S-231 with built-in supercapacitors, as the flagship product of Longsky, it is equipped with Sony's IMX291 image sensor, and the night vision and low-light shooting effect is very good. In addition, it also has lane offset, the distance between the front car, the start of the front car and other safety reminder functions, the current price is only 499 yuan, very cost-effective.