The Delta Medium Duty RSM is a durable and reliable remote speaker microphone designed for use with the Delta AS310, AS300, DS300, DS400, DS420, DS555 and DS580 radios. Built for performance in wet and dusty environments, it ensures clear, consistent communication in tough conditions. This RSM includes a Listen-Only port, allowing users to connect a discreet earpiece for private conversations—ideal for security, construction, transport, and industrial applications. Compact and tough, the Delta Medium Duty RSM offers dependable audio clarity and convenience in any work environment.
