Using this Microsoft Wireless 900 mouse and keyboard bundle is easy. First, turn on your computer. Then, connect the wireless receiver to a USB port on your computer. Wait for the system to recognize the devices. For the mouse, just hold it in your hand and start using it to move the cursor on the screen. Click the left and right buttons as needed. For the keyboard, start typing just like you would with any other keyboard. When it comes to charging, the mouse and keyboard are wireless, so make sure to keep an eye on the battery level. If the battery is low, use the appropriate charging cable to charge them. To maintain these devices, keep them clean. You can use a soft, dry cloth to wipe the surfaces of the mouse and keyboard. Avoid using harsh chemicals or abrasive materials as they might damage the devices. Also, store them in a dry and safe place when not in use.