Portable with Bluetooth or USB-C connection, 18 hours talk time & 3 hour charge time, 25m range, optimized for UC & Certified for Skype for Business, includes USB-C to USB-A adapter. The EXPAND SP 30+ Series incorporates portable wireless speakerphones for todays mobile workforce. The Series enhances your collaborations, enabling clear alignment and constructive problem-solving among your team regardless of time, space and location. Supporting both personal and small to medium-sized conferencing up to 8 people, it is possible to set up a call at a moments notice or use the device as part of a permanent conference room solution. Connect your device easily via a choice of Bluetooth or USB-C and start collaborating with your colleagues immediately. Enhanced voice pickup and superior speaker sound enables everyone on the call to engage with the same confidence and clarity as if being there in person. For relaxing between calls, enjoy impressive music performance with Sennheisers renowned