Not a sales gimmick. Two-way fast charge means that both the output and input support fast charging, and the output supports fast charging, that is, when the charging treasure charges the mobile phone, the charging treasure and the mobile phone support fast charging, and the input supports fast charging, that is, when the charging treasure charges the charger and the charging treasure support fast charging. At present, the charging speed is generally 5V, 2A is the base benchmark, the charging power exceeds 5V, 2A is the concept of fast charging, in principle, it is also divided into two directions of pulling high voltage and increasing current.