Flat yet trim

Weighing just 8 grams (0.28 ounce), the Plantronics M55 is thin, svelte, and rectangular. Attractive silver-metallic edges complement its glossy black hue. A discreet call button etched in gray is placed on the headset's front face, while a hidden LED sits below the surface.
Photo by: Sarah Tew/CNET

Switch it on

The bottom edge of the Plantronics M55 houses its long power switch, which is easy to manipulate.
Photo by: Sarah Tew/CNET

One size fits all

While the Plantronics M55 does provide a secure fit, thanks in part to the silicone sheath and stabilizer, its earbud comes in only one size.
Photo by: Sarah Tew/CNET

Toggle the volume

A volume button runs along the Plantronics M55's top edge. Pressing it will cycle through volume levels in ascending order.
Photo by: Sarah Tew/CNET

Small and sophisticated

One of the best attributes of the Plantronics M55 is its tiny size, which makes it more discreet to use. The headset's light 0.28-ounce weight is also very comfortable.
Photo by: Sarah Tew/CNET

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