Sennheiser XSW-D XLR Base Set - Wireless audio delivery system for wireless microphone

Key Features and Benefits: One touch ease-of-use 2.4 GHz digital transmission for worldwide operation 75m range (250ft) in optimal conditions Up to 5 hours battery life on a single charge Switch between multiple transmitters linked to one receiver Configure any combination of transmitters and receivers Mute from either transmitter or receiver