They sell third rate defective equipment without instructions. I bought video glasses that are supposed to be worned on ones face. When charging, the battery swells up and overheats. Imagine if this thing explodes on your face. Further, glasses are incomplete without some camre they sell separately and don't tell you upfront. The glasses are not bluetooth or any other method compatible with android or ios. Even Though Banggood site doesn't state that you have to pay for return shipping, Banggood.com wants you to pay to return their cheap garbage back. I left a negative feedback on their site which disappeared right away and all is left are deceitful positive feedbacks.
Don't buy anything from Banggood.com, they're a bunch of crooks like all Chinese companies are that I had a displeasure of dealing with.
This is the garbage they sold me without instructions and misleading webpage.