The gadget you are looking at is known as Rainpal and you can attach or detach it in 2 seconds. The device fits to just about any helmet, it gives you multi-speed visor wiping, wiper delay and visor cleaning spray, and it’s tested up to 100 mph (160 km/h).
The Rainpal – The First Ever Electric Wiper For Helmets!
The visor wiper activates either using a button on the device itself, or by using a wireless kit that sits on your handlebar. Rainpal charges via USB, with each swappable battery pack lasting about 90 minutes in continuous wipe. Objectively, this is a practical gadget for better visibility on a wet ride.
Check it out!