I7 i7s tws wireless bluetooth earphones headphones headsets stereo in-ear earbuds for iphone x xr samsung andriod ios phone how to pair : please refer to the instruction manual!how to pair : 1. keep away the bluetooth first!do not connect phone before you pair it well. 2. long press left and right button together until two led light flash red and blue alternataly. 3. double click either side button , wait one led light flash red and blue alternately