Unity SpeedPad / boost pad

Seeing as I'm almost USELESS at coding, AND using C# cause I learned about it first, I'm having a hard time making a speedpad. So, basically I want a script (preferably attached to the gameobject) to test if the player is colliding with an object called "booster" (no caps). Heres what I have right now.

      using UnityEngine;
      using System.Collections;
      
      public class Speedbooster : MonoBehaviour {
      
          // Use this for initialization
          void Start () {
          
          }
          
          // Update is called once per frame
          void OnCollisionEnter(Collision collision)
          {
              if (collision.gameObject.name == "player")
              {
                  GetComponent<Rigidbody>().AddForce(transform.forward * 500);
              }
          }
      }
      
 

So, once again, if possible I want a thingy (forgot what its called ;-;) in the inspector that I can change to change the amount of speed the player gains.