I have been waiting for this Keyboard to go down under $40 for couple months,, I'm so happy to finally able to order it today and hoping to pick it up soon!
Based on the review on Amazon this keyboard is pretty good because you don't need to have many keyboards to switch around 3 smart devices (IOS, Android, PS4 and possibly smart tv with bluetooth hid capable).
The Spec: Logitech K480
Bluetooth wireless computers or mobile devices which support external keyboards (HID profile).
PC: Windows® 7, Windows 8, Windows 10
Mac: Mac OS X® or later
Chrome OS™
iPad® or iPhone®: iOS 5 or later
Android™ tablet or smartphone: Android 3.2 or later.
Internet connection (for optional software download)
Dimensions
Height: 7.68 in (195 mm)
Width: 11.77 in (299 mm)
Depth: 0.79 in (20 mm)
Weight: 820 g (1.81 pounds)
Technical Specifications
Available in white and black.
Bluetooth range: up to 10 m (30 ft)*
Battery life: 2 years**
On/Off power switch
Battery life indicator light
well, this was cheaper two months ago
https://www.ozbargain.com.au/node/199700