The rechargeable bodypack transmitter has high-efficiency circuitry design. The included single rechargeable lithium battery can be easily removed or interchanged for charging. The intelligent battery charger maintains a high charge capacity for up to 600 charge cycles for cost saving and is environmentally friendly. It can directly match to high-low input impedance for microphone or guitar without switching. Five selectable gain settings and built-in level limiter prevents distortion at the maximum input level.