Hollyland Solidcom C1 Pro Roaming Hub -- Allows up to 20 headsets and 6 groups, seamless roaming, an extensive range of 1,600ft (500m), and backward compatibility. V-Mount and G-Mount variants for external battery compatibility. Available as the Roaming Rub by itself, or as kit with 10 or 20 C1 Pro single-ear noise-cancelling headsets.