Price $85 to $150 (2)$150 to $350 (1) Earpiece Type Monaural (2)Binaural (1) Product Model 3315 (1)3325 (1)40 (1) Sound Mode Mono (2)Stereo (1) Product Line Blackwire (2)Evolve2 (1) Manufacturer Poly (2)Jabra (1) Host Interface USB Type AMini-phone (3.5mm) (2)USB Type A (1) Country of Origin Mexico (2)China (1) Brand Name Poly (2)Jabra (1) Weight (Approximate) 70 g (1)96 g (1)