It depends on the online store. It varies but most of the time is only one. 3% Off on Apple iPhone Accessories plus Worldwide Free Shipping. I found this from Google and some other coupons are also available at couponmeup.com/coupons/ .
Coupon Code: CJKHZJGB
Yes, this is happiest thing that buying expensive iphone accessories with coupon because coupon gives us advantage of 3% off or more and world wide shipping free.I like to buy my iphone's accessories this way.