With the Sennheiser SP 30+ Office Headset, you can have conversations with 8 people at the same time. This way, every participant of the conference call can be clearly understood. You can connect the SP30 + wirelessly via Bluetooth or with the included USB cable. You can connect the Sennheiser to a laptop, PC, smartphone, or a tablet. Thanks to the 2 integrated long-distance microphones that cancel sound and echo, you can also have a clear conversation in a larger meeting room. With a full battery charge, the speakerphone lasts up to 18 hours, enough for a working day.