Solar Powered Headphones - Urbanista Los Angeles

Dive into Infinite Playtime: Introducing the Urbanista Los Angeles. Tired of dead batteries and endless charging cables? Enter the future of sustainable sound with the Urbanista Los Angeles, the world's first self-charging wireless headphones powered by Powerfoyle™ solar cell material!
Features:
Solar Power Revolution: Witness the magic of Powerfoyle™ technology, converting any light into endless playtime. Ditch the charger, embrace the sun!
Noise Cancelling Oasis: Escape the hustle and bustle with advanced active noise cancellation. Immerse yourself in pure audio bliss, wherever you roam.
Effortless Harmony: Experience seamless Bluetooth connectivity and intuitive controls. Manage your music, calls, and ANC with a touch.
Sustainable Style: Look as good as you sound with the LA's sleek, minimal design. Available in Midnight Black and Sand Gold, these headphones are the perfect everyday accessory.
Crank up the tunes, cancel out the noise, and soak up the sun!
#solarheadphones #selfchargingheadphones #solarpowered

[@LiranBarsisa]

I have a few questions:
1. How well does it charge inside the house? On the box it shows it can charge inside the house, but how well?
2. Does it have a microphone? How well is it?
3. OK to use it without their app?
4. What if my PC doesn't have BT ? Can use a USB cable? Or headphone jack?
5. Are the "pillows" of what's close to the ears - replaceable in case they get damaged? Where can I find them?