The safety bar spacing is adequate. This set is ready to use from out of the box. I had to return them though because they didnt quite conform well to my gnarly bunions. 04)- WiFi required installing the `broadcom-sta-dkms` for this 14e4:43a0 (rev 3) Broadcom 4360- DO NOT INSTALL the b43 driver, it doesnt support this card. If they could have at least shortened it to maybe 1 meter, I would not be writing this. These over-ear headphones feel slightly tight and uncomfortable pressing against the ear, with mediocre padding. I bought these to replace my ATH-M50s phones which are now more than nine years old. Dre wireless headphones! For the first time it really feels like a mechanical keyboard. I bought this for my 7 year old son.