Enhance your efficiency with the Tri-Fold Metal Bluetooth Keyboard, which can connect to iOS / Windows / Android system devices. With magnetic smart switch, open it to power on instantly, and close it to automatically power off, conserving battery life. Built-in stand functionality for easy placement of phones and tablets. Rechargeable built-in 380mAh lithium battery. Experience a comfortable typing experience with scissor-switch keys and chocolate-keycaps. Durable metal hinges ensure a stable connection at the folding points. The lightweight and palm-sized keyboard with tri-fold design can be folded and carried around.