The measuring space of this detector is about 25~45 square meters. The closer to the detector, the more accurate the measured data. 

K&F CONCEPT comes with a wet and dry pack and a squeegee to allow the user to clean up the product before laminating it, so that it can be laminated better. 

Hi, that's a good question. The Autel Nano plus is undoubtedly more powerful and more affordable than the DJI Air 2S. Below we compare the two models from the following aspects: Portability: The Autel Nano plus is a 249g ultra-lightweight mini drone with a 4K camera and weighs only 42% less than the DJI Air 2s, allowing EVO nano plus is more portable and easier to carry. Night Vision Quality: The Autel Nano+ drone uses the latest advanced RYYB array, which absorbs 40% more light than the Air 2S. The DJI air 2s still uses the traditional RGGB design and is definitely not the opponent of the nano plus drone. Under the same lighting conditions, the picture quality of evo nano+ is clearer and the details are richer. Flight Capability: The Autel EVO Nano Plus drone has a maximum flight altitude of 800 meters, while the DJI Air 2s can only reach 500 meters. Autofocus capability: The DJI Air 2s only supports Contrast Focusing (CDAF). The Autel EVO nano+ drone supports dual autofocus and can support phase-phase focus (PDAF). This ensures that the Autel evo nano plus beats the DJI Air 2s in dynamic object tracking. 

These binoculars have night vision in low light conditions and can be used at night but not in total darkness. 

yes, however for added stability you should add counter weight at the bottom.