Can you guys suggest me a good Bluetooth Keyboard? I am looking to spend less than $50 USD.

I like Logitech K380 but the keys are circle and I'm not sure if I'll like that.

good and less that $50?
that's a good dream.

you can look on ebay for used apple ones.

yeah. Don't buy one if you can. Use with OTG if it's a mobile device.

Why?

1. You will have problems if you want to listen to a bluetooth headset and work with the keyboard at the same time.

2. Bluetooth sucks at its power saving features. Devices turn off quickly, and take a while (1 second, or 2) to wake up.

3. Its range sucks. I mean in meters through air it's actually good, but it will interrupt if someone holds a hand between the keyboard and device sometimes. It's very weak.

4. Batteries are worse for some reason.

My experience comes from using various bluetooth devices, mice mostly, which have never been a good experience on bluetooth. And not cheap ones either. Razer Orochi is an awesome mouse, but its bluetooth connectivity sucks just like every other cheaper bluetooth mouse that I've tried.

5. Bluetooth security sucks. It's getting better, but still bad, you're pretty much broadcasting what you're typing to any receiver in range. Please get a wired keyboard with OTG for anything that you use often.