Beats Electronics has unveiled its redesigned Beats Studio headphones ($300). The new Studio headphones come with an enhanced 20-hour rechargeable battery, dual-mode adaptive noise canceling, and “reengineered sound.” An auto on/off switch helps conserve battery power, and a battery gauge lets users monitor power. The battery can be recharged via micro-USB cable. The new Beats Studio headphones come with the company’s new DSP…
