A:Answer Hi Violet! This model is mainly designed for any android/iOS cell phone or tablet that supports Bluetooth headsets. If you'd like to use the unit with your PC and a soft phone like Five9, it will really depend on the native Bluetooth from your computer/laptop. Many devices nowadays have native Bluetooth; However, not all of them support Bluetooth headsets. Bluetooth technology works through different profiles, and these are the ones the ear buds require to at least allow a connection: A2DP 1.3, HFP 1.7, HSP 1.2, AVRCP 1.5, SPP 1.2. As we've mentioned it may pair, yet we are unable to guarantee optimal performance in terms of audio quality, connectivity and range. We hopw you will find this information useful. If you have any questions, feel free to contact our Customer Care Team at: 1-855-765-7878