Transmitter and receiver both require 2 AA batteries. (4 total)

Replacement cost: EK 100 G3 diversity receiver $250 / SK 100 G3 bodypack transmitter $250 / ME 2 omnidirectional clip-on lavalier microphone $75 / CL 1 3.5mm jack cable $5 / CL 100 XLR cable $10 / CA 2 camera mounting adaptor $5

AHML cardholders only

"The Sennheiser EW 112P G3-A is a wireless microphone system, featuring the ME 2 clip-on condenser microphone, SK 100 G3 Bodypack transmitter and EK 100 G3 Compact diversity receiver. The system can be used with cameras and camcorders with 3.5mm minijack and 3-pin XLR microphone inputs.."--website