1. The Hardware Quality Assurance of the Products stipulated in this Contract shall be 36 months after the arrival of the Goods at the Port of Destination and during the period damage caused by the buyer's considerations shall be the buyer's own responsibility; Software can be upgraded free of charge

2. The software provided by seller will be developed t and upgraded as Alazhar university request and provided free of charge for buyer, and the upgrade service will be free for life.

3. According to the actual situation of Party Buyer's later promotion, seller will provide buyer with a 55-inch touchable screen (include software) for promotion.