iPazzPort 3-color Backlit Wireless Mini Keyboard and Mouse Touchpad for $7.49 after coupon code 9UXGR8AH. Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for reference. It has 3 different colors of backlight, and works with Raspberry Pi 3, Windows, Android, Google, Smart TV, Linux, and more.