I also have a Nicron B74. Gold and blue versions. I also have a Nicron N7. All have the same user interface. High, low. While holding down the button, it is strobe / sos. B74 purchased at Gearbest in April 2018, N7 at Aliexpres in 2018 and 2019 (four pieces as gifts).
The B74 is my favorite flashlight for every day. Powerful magnet, large button, angle head, battery with micro USB charging, AA cell option. I have been using it very often since April 2018 and is absolutely reliable.
