This module is a combination of an OLEDIIC interface module and an EC11 rotary encoder module. The two are not related, but are placed on same board as an integrated module, with additional return and confirm buttons. The button interface is also and can be for use according to actual usage. Integrated design, more concise and beautiful, convenient for DIY. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect use. Color: Random colors, no specified colors accepted Material: PCB Package Contents: 1 x OLED Display Module Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.