in order to enjoy a stereo headset, it is necessary to have the headset being used in both ears. Many may prefer to only put an earphone in one ear to have the other ear free. While this is certainly an option and personal preference, it will not provide stereo sound, as stereo requires two different speakers.
BS 25999 was BSI's standard in the field of Business Continuity Management (BCM).he first part of BS 25999 (BS 25999-1:2006) was published by the British Standards Institution in December 2006. The second part of BS 25999 (BS 25999-2:2007) was published in November 2007.
The standard inline skates bearings have the designation 608. The 608 means that the bearings are from the 600 series, with a 8mm inner diameter (the width of the hole, i.e., internal bore). The 6 appears to be for the 6mm difference between the inner and outer radii (from the outside edge to the edge of the hole). 608 bearings are also the standard size for skateboard bearings. Quad skates use either type 608 (8mm internal bore) or type 627 (7mm internal bore).