diff --git a/index.js b/index.js
index 6225aae..75dd477 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 class IdmQuantityPicker{
-  constructor({selector , min = 1, max = 99}) {
-    const container = document.querySelector(selector);
+  constructor({selector , min, max, ref}) {
+    const container = selector ? document.querySelector(selector) : ref;
     if(!container){
       console.error("IdmQuantityPicker: container not found.");
       return;
@@ -13,6 +13,18 @@ class IdmQuantityPicker{
     }
     this.input = input;
     
+    if(typeof min === "undefined"){
+      min = this.input.min;
+    }else{
+      this.input.min=min;
+    }
+    
+    if(typeof min === "undefined"){
+      max = this.input.max;
+    }else{
+      this.input.max=max;
+    }
+    
     this.min = min;
     this.max = max;
     this._value = Number.parseInt(input.value);