Jabra Evolve2 30, USB-A, MS Mono (23089-899-979) Headset Features - Answer/End Controls, Music Control Microphone Design - Boom Microphone Sensitivity -38 dB Speaker Driver Size - 28.00 mm Earpiece Design - On-Ear Listening Mode - Mono Speaker Frequency - 20 Hz to 20 kHz Speaker Sensitivity - 115 dB Host Connection - 1 x USB Wearing Style - Over-the-Head Cable Length - 1.5 m Dimensions - 151.7 x 174.6 x 55.7 mm Weight - 92 g (Headset)