Sennheiser EW 135 G3 Radio Mic. Versatility for every style of music and presentations: you can depend on great performance from the ew 135 G3 vocal system. The handheld microphone now allows you to charge the optional rechargeable pack while it remains in the transmitter. Wirelessly link up the transmitter with the receiver with a single touch of the sync button. The true diversity receiver has a backlit graphic display that makes it easy to read under all lighting conditions.