POLY Plantronics CS540 Wireless Headset System Does the Plantronics CS540 have noise-cancelling capabilities? Yes, it has a noise-canceling microphone that reduces background noise disruptions. Is the Plantronics CS540 comfortable to wear for long periods of time? The Plantronics CS540 is generally considered to be a comfortable headset to wear for long periods of time. The headset is lightweight and has soft ear cushions, which can help to reduce fatigue during extended use. Can I use the Plantronics CS540 with multiple devices? Yes, it connect to a deskphone and computer, one at a time. What is the range of the Plantronics CS540 headset? It has a roaming range of up to 120 m/400 ft. Can the Plantronics CS540 be used with a computer or a phone? Yes, it can be used with a computer but not with phones. Poly Plantronics Series Plantronics CS540 Buying Options Poly Voyager 5200 Buying Options Poly Voyager 5200 UC Buying Options Poly Voyager 4320 UC Add to Cart Poly Voyager Focus 2 UC Add to Cart Poly Voyager Focus UC Buying Options Poly Voyager 8200 UC Buying Options Customer Reviews 5.0 out of 5 stars 1 3.8 out of 5 stars 23 4.2 out of 5 stars 416 — 3.7 out of 5 stars 5 4.4 out of 5 stars 3 3.9 out of 5 stars 27 Price — — — $199.99$199.99 $199.00$199.00 — — Full Media Control: Phone Apps ✘ ✘ ✘ ✔ ✔ ✔ ✔ Advanced Sensor Feature ✘ ✔ ✔ ✘ ✔ ✔ ✔ Active Noise Cancelling ✘ ✘ ✘ ✘ ✔ ✔ ✔ Charging Device Included Charge Stand Wall Charger Wall Charger Optional Charge Stand Optional Charge Stand Yes Yes Talk Time 7 hours 6 hours 6 hours 24 hours (19 hrs default mode) 25 hours (18 hrs default mode) 12 hours Up to 20 hours Bluetooth Version 5 5 5 5.2 5.1 4 5 Desk Phone Connectivity YES - Standard RJ-9/RJ-22 Port YES - Bluetooth Desk Phones YES - USB & Bluetooth Phones YES - USB & Bluetooth Phones YES - USB & Bluetooth Phones YES - USB & Bluetooth Phones YES - USB & Bluetooth Phones USB Connectivity Optional Adapter Required Optional Dongle - BT600, BT700 Bluetooth Dongle Included Bluetooth Dongle Included Bluetooth Dongle Included Bluetooth Dongle Included Bluetooth Dongle Included