This is the Poly Savi 7210 + HL10 combo package. Poly Savi 7210 has improved performance, greater range, same reliability as the previous Plantronics CS510. headset. Now with a range up to 400ft, up to 12 hours of talk time (vs.only 8 hrs before). Extra large ear cups for extra comfort for all day use, without any pinching. Still very light weight, only 104 grams.
For more information, see Poly Savi 7210 datasheet