Sennheiser ew 100 G4-845-S B-Band, UHF Wireless System, SKM 100 G4-S handheld transmitter with mute switch and E845 replaceable capsule, Frequency range: B-band (626 - 668 MHz), Includes rackmount, RJ10 connection cable, microphone holder, NT2 power adapter and 2x AA batteries@+*Features of E845 replaceable