Plantronics M55 Bluetooth Headset
We built the M55 for professionals who refuse to compromise on call clarity or comfort. This compact Bluetooth headset delivers rich audio through advanced noise reduction technology that filters out background distractions, so your voice comes through crystal clear on every call.
The ergonomic earhook design rotates 180 degrees to fit either ear, and the soft gel tip sits comfortably for hours without fatigue. At just 0.3 ounces, you'll barely notice you're wearing it. The M55 pairs instantly with your smartphone or tablet and remembers up to eight devices, making it effortless to switch between work and personal lines.
Voice alerts announce battery level, connection status, and caller ID directly in your ear, so you stay informed without pulling out your phone. We optimized battery performance to give you up to 11 hours of talk time and 16 days of standby on a single charge.
M55 quick specs
Bluetooth connectivity and multipoint pairing
The M55 uses Bluetooth 3.0 technology to maintain a stable connection up to 33 feet from your device. Pairing is instant — simply power on the headset and it automatically enters discovery mode for first-time setup.
Multipoint connectivity lets you connect two devices simultaneously, so you can take a work call on your desk phone while staying connected to your personal mobile. The headset announces which line is ringing, and you can answer either one with a single button press. Our customers who frequently juggle multiple phones appreciate the flexibility this brings to busy workdays.
Audio performance and noise reduction
We engineered the M55 with dual-microphone AudioIQ2 technology that isolates your voice from surrounding noise. Whether you’re on a crowded street or in a bustling office, the system analyzes incoming sound and suppresses everything except your speech.
The 10mm speaker driver delivers rich, natural audio for both calls and media streaming. A2DP support means you can listen to music, podcasts, or GPS directions through the headset with clarity that rivals dedicated earbuds. Bass response is balanced for voice frequencies, ensuring callers hear every word without distortion.
Comfort and wearing options
Earhook design
The 180-degree rotating boom lets you wear the M55 on either ear without buying a separate model. The soft silicone earhook cradles the curve of your ear, and the adjustable arm tightens or loosens with a gentle squeeze.
Gel eartip
We include three sizes of gel eartips in the box — small, medium, and large — so you can find the perfect seal. The medical-grade silicone won’t irritate skin during extended wear, and the open-ear design lets ambient sound through when you need situational awareness.
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Common questions about the M55
Power on the headset by sliding the power switch to the on position. The LED will flash red and blue, indicating pairing mode. Open Bluetooth settings on your phone, select PLT M55 from the available devices list, and confirm the connection. The headset will announce connection status once paired. For subsequent uses, the M55 reconnects automatically when powered on.
Yes, the M55 supports multipoint connectivity for two active devices simultaneously. Pair the first phone as usual, then repeat the pairing process with your second phone while the headset is still powered on. The M55 will maintain connections to both devices and announce which line is ringing when a call comes in. You can answer calls from either phone with a single button press.
The M55 maintains a stable Bluetooth connection up to 33 feet from your paired device in open space. Walls and other obstacles may reduce effective range. If you move beyond range, the headset will announce connection lost, and it will automatically reconnect when you return within range.
A full charge provides up to 11 hours of continuous talk time or 16 days of standby time. DeepSleep mode activates automatically when the headset is out of Bluetooth range for 90 minutes, extending standby duration. Charging from empty to full takes approximately 90 minutes using the included USB cable and AC adapter.
We include small, medium, and large gel eartips in the box. Start with the medium tip and test the fit. The eartip should create a light seal without pressure or discomfort. If the headset feels loose or falls out during head movements, try the large tip. If you experience ear pain after 30 minutes, switch to the small tip.
Yes, the M55 supports A2DP audio streaming for music, podcasts, GPS directions, and other media from your paired device. Audio quality is optimized for voice frequencies but delivers balanced sound for casual listening. To stream media, ensure your phone is connected and play audio as you normally would.
The M55 supports voice dialing and voice commands through your phone's native assistant. Press and hold the call button for two seconds to activate Siri, Google Assistant, or other voice services on your paired device. The headset microphone will pick up your commands and relay responses through the speaker.