The lavalier/headset set version of the DWZ digital wireless microphone system offers high quality 24-bit/48KHz linear PCM digital transmission and is optimized for applications such as churches, schools, community halls, hotels, board rooms and small theatres. The system is supplied with the ECM-LZ1UBMP digital wireless uni-directional electret condenser lavalier microphone and the ECM-HZ1UBMP digital wireless uni-directional electret condenser lightweight headset microphone. Using the 2.4GHz frequency band for transmission, the DWZ-B70HL can be used licence- and cost-free in nearly every country worldwide. The system also includes AES 128-bit encryption technology to ensure highly secure transmission. With 24-bit linear PCM digital, you get high sound quality with reliable RF transmission, utilizing unique transmission technology developed by Sony. Also, with support for two RF modes, your experiences can be shared over WiFi. The Intelligent Feedback Reducer function suppresses unwanted feedback.