Laser virtual keyboard, projection keyboard, or laser keyboard projector is a non-physical keyboard that can be projected to a surface. Can be connected to a phone, tab, or computer as long as they have Bluetooth installed.
Its pocket-sized device that can be carried everywhere, you can connect to USB cable when it needs to be charged. 2-3 years back the price is about $300 but now you can get in about $28-$32 which is affordable.
Laser virtual keyboard has become a concept for a long time and now become reality.
See the video below how this laser keyboard projector in action:
Now available: https://amzn.to/2vc2S38