Jabra Pro 9450 Mono Headset 9400HS &. Base 9400BS - SKU # 9450-25-707-102. Headset - Jabra 9400HS. Base - Jabra 9400BS. The Mono version of the Jabra PRO 9450 Mono Flex Cordless Headset has one earpiece, which allows you to communicate without losing touch with what is going on around you.
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