Plantronics Bluetooth Headset Comparison Guide Model Discovery 975 Savor M1100 Voyager Pro HD Headset Style In-the-Ear In-the-Ear Over-the-Ear, In-the-Ear Talk Time 5 hrs 4 hrs 6 hrs Roam Distance 33 ft 33 ft 33 ft Headset Weight 8 grams 9 grams 17 grams Compatibility Mobile Phone – Bluetooth Mobile Phone – Bluetooth Mobile Phone – Bluetooth Charge Time 1.5 hrs … Continued