(Only compatible with Contactless and chip 2st generation)! The square reader dock has an anti-sleep button, and you can activate the Square Dock without having to take it out of the dock. | With a USB interface, you can power the dock through USB without worrying about the safety hazards caused by too long power cables. | The bottom has a non-slip silicone pad, which can effectively prevent loosening during use. | The perfect counterweight, after half a year of testing, engineers finally determined the most scientific counterweight weight, which is easy to carry without affecting its functionality. | Packaging Details: 1x Dock, 1x 1.5m charger cable (device not included)