Sennheiser EW D1-845S Evolution Wireless D1 Digital Vocal System with Handheld Microphone E845 Dynamic Super-Cardioid Capsule Plus Wireless Microphone Accessory Kit SKM D1 Handheld Transmitter & e845 Head EM D1 Rackmount Digital Receiver Uses License-Free 2.4 GHz Band Up to 15 Channels Includes: KELLARDS Wireless Microphone Accessory Kit