A chemical property is a characteristic of a pure substance that describes its ability to change into different substances. For example, a chemical property of methane is that it can catch fire and burn in air. Physical properties can be observed or measured without changing the composition of matter.
The downsides are obvious: Almost everyone has headphones, speakers, and other gadgets based on the ubiquitous 3.5 mm headphone jack. Eliminating this connection could render these devices unusable, or at least force everyone to carry around an extra adapter. But Apple doesnât care.
Motorbike Helmet Headphone 3.5mm With Speakers Volume Control for MP3/4 iPod. If you have an MP3 attached to your motorbike, get great sound whilst you re on the move with this pair of helmet speakers. Note:1.Fit for most 3.5mm jack devices such as CD, radio, repeater, mp3, mp4...