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This Bluetooth can multitask

Your home, neighborhood coffee shop and, on better days, the beach have all served as your mobile office. Unfortunately, not every headset can accommodate such an on-the-go lifestyle. Sennheiser's latest Bluetooth headset, the VMX Office, works with landlines, computers and cell phones, so you need only one device.

The Office's Bluetooth compatibility (1.0, 1.1 and 2.0) allows for hands-free calls up to 100 feet away, and a single button lets you switch between landline and mobile devices. The VMX's VoiceMax technology reduces invasive background noise and picks up and enhances human voices.

The $280 VMX Office, out now, also comes equipped with five hours of talk time and more than 100 standby hours. AZADEH ENSHA, NEW YORK TIMES

Oversized mouse extends and tilts

Technology should fit your needs, not the other way around. At least that's the sentiment behind the ergonomically designed Switch Mouse, which can stretch and tilt to fit your hand. Created by Humanscale, which makes adjustable keyboard and monitor supports, the $120 Switch Mouse is about 30 percent bigger than a typical mouse. The size is intended to mitigate wrist injuries like carpal tunnel syndrome by incorporating a built-in palm rest and encouraging users to move the mouse with arm motions rather than the more vulnerable wrist muscles.

The bracket can be set for left- or right-handed users. Just don't expect it to feel natural the first time you use it. Discouraging bad but ingrained mouse habits can take some time. JOHN R. QUAIN, NEW YORK TIMES

A familiar look from Nokia

For years, Nokia has shied away from cell phones that have large touch screens. Keypads and keyboards seemed to be in the company's DNA, resulting in a number of phones that look about the same. Now, however, Nokia is ready to expand its music line with a phone that looks suspiciously like another phone that begins with the letter “I.”

The 5800, available near the end of the year for about $300 (no carriers have been named yet), includes an 8-gigabyte memory card and is compatible with Windows Media Player and Nokia Music Store files. A resident PC application allows you to rip CDs to the phone automatically, and it includes Nokia's Comes With Music service – a free music download service available for one year after purchase.

The 3.2-inch touch screen offers virtual-keyboard and pen-input modes (included are a stylus and an accessory shaped like a guitar pick for swiping through photos and music). Also included is a camera and a built-in GPS receiver. The 5800 can connect to 3G and Wi-Fi networks and has special social-networking features including adding “feeds” for four of your favorite contacts, allowing you to view updates right under their pictures. JOHN BIGGS, NEW YORK TIMES

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