It is hard for me to participate in the enthusiasm of most of the respondents. I find the rear switch of the flashlight too hard to press. Even the USB ring seems too hard to rotate. Both turbo-mode presses require presses with more demanding timing than other flashlights and are easy to miss. This is problematic in an emergency situation. When the flashlight is switched off from turbo mode and turned on again, the flashlight does not return to the high mode but to the lowest mode. Also problematic in my opinion.
If I could, I would return them. I bought two. But the Chinese are making trouble returning products. Both BG and GB. I hope I can write a negative review here in the forum and do not stick to the Chinese character. They censor negative criticism. If you do not believe, look for a review with one star in BG.