What are the core technologies of mobile video calling?

VOOC flash charging is a fast charging technology independently developed by OPPO. It has applied for 18 patents, which has increased the fastest charging speed by more than 4 times, and has impeccable intelligent full terminal five-level protection. It is the fastest and safest mobile phone charging technology in the world. You can make a phone call for 2 hours after charging for 5 minutes, and the mobile phone can be directly charged to 75% in 30 minutes.