the chip is meant to suppress the pheromones :]
The chip here has functions of suppressing pheromones as well as contraception for Omegas. It was mentioned around chapter 3 iirc
In Dash's universe, only Omegas release pheromones while Alphas have something called PRE (pheromone response element), which makes them react sensitively to Omega's pheromones. That's why they invented chips for Omegas and pheromone-sensitivity reducers for Alphas to avoid any incidents.
Oh shit! So he is a Omega !! Σ( ￣□￣)
Was gonna ask this same question. Lol
Why do he have to live with a chip ? Did I lost something while reading?