Bind with ngModel

[christodev1]

how can i bind ngAutocomplete with ngModel?
I have a model like this

let prod:Product = {
id:1,
name:"cookie",
item_supplies:[
{id:1,name:"test",quantity:5},
{id:2,name:"test1",quantity:44},
{id:3,name:"test2",quantity:22}
]
}

So i need a input (autocomplete) for every item_supply. How can i bind with ngModel?