The Saramonic WiTalk9-Link is an Adapter Kit that includes a 4.9’ (1.5m) TRRS cable for cascading WiTalk9 systems and connecting the WiTalk9 system to Computers, Smartphones, and Tablets. Making it possible to connect multiple WiTalk9 systems for up to a 30-person system, without a Hub. The Link cable also allows you to connect the WiTalk9 system to a computer, smartphone, or tablet, connecting the intercom team to virtual meeting apps, phone calls, and more. A USB audio interface with a USB-C adapter is also included for digital connection to these devices. Saramonic WiTalk9-ADPT Adapter Kit with TRRS CableCable, USB TRRS Interface, and USB-C Adapter for Expandability of Witalk9 Wireless Intercom Headset 1x 3.5 mm TRRS Audio Cable1x 3.5 mm TRRS Female to USB-A Audio Interface1x USB-A Female to USB-C Adapter Key Features Cascading Link Cable that connects WiTalk9 Intercom Systems together, Expanding the System to up to 30 Users Device Connection Cable to connect WiTalk9 headsets to Computers, Smartphones, and Tablets to connect to meeting apps and phone calls expanding your team anywhere in the world 4.9-foot (1.5m) Cable allows users to comfortably connect to mobile devices and computers, as well as position the cascading headsets in optimum positions for best reception USB Audio Interface with USB-C adapter is included, giving you more options to connect to Computers, Smartphones, and Tablets Rugged, Flexible, and Durable cable with electromagnetic shielding, designed to handle the rigors of a professional work environment, or on the road Key Specifications TRRS Cable Length: 4.9’ (1.5m) TRRS Cable Weight: 7oz (20g) USB Audio Interface Input: 3.5mm TRRS Warranty: 2-Year Authorized Saramonic dealer – The LA Firm, Los Angeles.