cayinn3

I have 2pc cayin n3 2pc lg g4 and 1 redmi note 3 (all android based) Headphone realated : Sennheiser hd 4.40bt and pxc 550 For first, i can pair hd 4.40bt with everything. But i must into pairing mode at headphone by hold button. The led blink red and blue. So the hd 4.40 is discoverable...