A:AnswerYes, you can pair it with a Windows system by going to your control panel, Hardware and Sound, add a device. When pairing make sure the Buds are in the case and the case is closed. When using with your computer, you can not use with the phone. You can only use with one device at a time.
https://youtu.be/HWduQvVHE2E
YouTube video to help
A:AnswerI wouldn't use these as earplugs or ear protection. They r noise canceling, but shouldn't be used where ear protection is needed. OSHA would have a fit. But these could be concealed under an over- the-ear protection device.
A:AnswerNo, you can share music/sound from one phone to 2 pair of buds simultaneously. But one pair of buds cannot be paired to 2 different phones simultaneously. Hope that helps.