Tested and works Jabra Speak 510 Bluetooth USB Conference Speakerphone in black is a high-quality audio conferencing device designed for business professionals. With Bluetooth connectivity, it allows for seamless integration with various devices for a hassle-free communication experience. The sleek design and advanced technology of the Jabra Speak 510 make it a reliable choice for efficient and clear conference calls. Perfect for office settings, this speakerphone from the trusted brand Jabra is a top choice for those looking to enhance their telecom systems.