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Black mono headset with over-ear form factor, convertible wearing styles and noise-cancelling microphone

Plantronics

Plantronics CS540 Wireless Headset Mono Convertible

SKU CH-M4G6-BPFE8

A wireless mono headset with convertible wearing styles, DECT security, and SoundGuard protection limiting audio to 118 dBA

  • Wireless TypeBluetooth
  • Protects hearing with SoundGuard limiting audio to 118 dBA
  • Extends talk time by automatically downshifting power when near base
  • Offers narrowband or wideband audio modes for clarity or endurance
  • Secures calls with DECT technology that avoids Wi-Fi interference
  • Provides three wearing styles for flexible all-day comfort

What the headset does and who uses it

The Plantronics CS540 is a single-ear wireless headset built for desk-phone workers who need hands-free calls. Its convertible design offers three wearing styles so users can choose over-the-ear, over-the-head or behind-the-neck fit. DECT technology keeps conversations clear and secure while avoiding Wi-Fi interference in busy offices.

Sustained call performance

An adaptive power system automatically downshifts to low power when the headset sits close to the base, extending talk time during long shifts. Professionals can switch between narrowband mode for maximum battery life and wideband mode for richer voice clarity without dropping the connection. SoundGuard technology caps audio peaks at 118 dBA to prevent acoustic shock during extended use.

Heat noise and power in daily use

The lightweight over-ear form factor stays comfortable through full workdays without generating noticeable warmth. No active cooling is required so the unit runs silently on the desk or head. Wireless DECT operation draws minimal power from the base station, keeping energy use low during continuous call handling.

Highlights

  • Protects hearing with SoundGuard limiting audio to 118 dBA
  • Extends talk time by automatically downshifting power when near base
  • Offers narrowband or wideband audio modes for clarity or endurance
  • Secures calls with DECT technology that avoids Wi-Fi interference
  • Provides three wearing styles for flexible all-day comfort

Specifications

Wireless TypeBluetooth

Questions about this item

How loud can the CS540 headset get before SoundGuard limits the volume?

SoundGuard acoustic limiting technology protects against Acoustic Shock by limiting sounds to below 118dBA, ensuring listening comfort and protection against audio spikes.

Which desk phone port does the CS540 base connect to for it to work?

The CS540 connects to a desk phone, typically via the handset or headset port on the telephone base unit.

Will the CS540's DECT signal interfere with my older Wi-Fi router?

DECT technology provides better audio quality and eliminates interference from Wi-Fi networks while calls stay safe and secure.

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