The Solidcom C1 Pro - Full Duplex Wireless Intercom System is Hollyland's first true wireless and standalone headset communication solution with exceptional sound quality. With the latest technology of 1.9GHz frequency, the C1 Pro headset supports up to 350m range with only 40ms delay. It uses strong encryption technology to ensure the security of conversations, and is equipped with a dual antenna diversity solution to improve the anti-interference ability and ensure the stability of the connection. The master headset can work 5-6 hours, the remote headset can work 10 hours. In addition, each headset is equipped with two replaceable batteries, so you don't have to worry about running out of power when filming. At only 168 g, the single headset is super light and comfortable enough to be worn all day long. Solidcom C1 Pro is easy to use and pairs automatically. It helps team members communicate and improves team efficiency. You can add more remote headsets if needed to create an 8-user system without HUB. Solidcom C1 Pro wireless headset with can support up to 9 users with one hub. Of course, it is possible to further increase the number of users by cascading base stations. Solidcom C1 Wireless Intercom System can be used in a variety of scenarios, such as film production, boating, drone shooting, video production, wedding, stage production, etc.