Using your Sennheiser SKM 500 G4 - AW+ wireless handheld transmitter is easy. First, make sure it's properly charged or has fresh batteries. Turn it on and pair it with your compatible receiver. When speaking or singing, hold the transmitter at a comfortable distance from your mouth. It's important to check your country's wireless frequency laws before using it, as some frequency ranges might be illegal in your area. To maintain your transmitter, keep it clean by using a soft, dry cloth. Avoid exposing it to extreme temperatures or moisture. If you're not using it for a long time, store it in a cool, dry place. Replace the microphone capsule when it starts to show signs of wear and tear to ensure consistent sound quality.