HP Poly CS540A (MPN 8R706AA#ABB) is a business headset supplied with a handset lifter for office and call-center communication.
Its monaural, supra-aural earpiece and boom microphone keep audio to one ear during calls. Wearing options are described as ear-hook and handheld, giving flexibility in how it is used at work.
The headset supports DECT, with a stated wireless range of 120 m and listed talk time of 7 hours. These specifications suit desk-based calling, while the handset lifter is included for use with a phone handset.