Not sure which type of smartphone your customers have? You can be versatile and give them this promotional charging cable with adapters for both newer and older models. USB type C and 2-in-1 adapters for iOS and Android are included. The retractable feature for the cables adds an element of appeal that avoids wire tangles. A one color imprint on the top of the rounded cable retractor is include in the price. Additional imprint colors are available for an added cost. Please call for more details