HP Poly CS540

The Poly CS540 is a professional wireless DECT headset system designed primarily for desk phone communication in office and business environments. It provides hands‑free mobility, reliable audio quality, and comfort for extended use throughout the workday. 

Wireless freedom: Uses DECT™ wireless technology to connect to your desk phone with a substantial range (up to ~120 m or ~350 ft), allowing you to move freely around your workspace while on calls.

Optimized talk time: Offers up to 7 hours of talk time on a single charge, with standby lasting several days.

Professional audio: Noise‑canceling microphone helps reduce background noise so callers hear you clearly, and the headset supports both narrowband and wideband audio options for natural voice quality.

SoundGuard protection: Includes SoundGuard acoustic limiting technology to protect your hearing by limiting sudden loud sounds above ~118 dBA.

Convertible design: The headset is lightweight (approx. ~21–22 g) and convertible, letting you wear it in multiple styles (over‑the‑ear, headband, or behind‑the‑head with optional accessories).

Integrated controls: Comes with simple on‑headset call controls (answer/end, volume, mute) for easy call management.

Compatibility: Designed to work with most office desk phones via standard RJ‑11 telephone interface cable included in the box.