Using this Sennheiser SKM 2000XP handheld transmitter is easy. First, connect your e965 microphone capsule. You can choose between cardioid and supercardioid polar patterns according to your sound pickup requirements. When it comes to power, you'll need to provide your own batteries as they aren't included. Before using, always check your country's wireless frequency laws, especially since frequencies above 608 MHz (except 614 - 616 MHz) are illegal in the U.S. For maintenance, keep it in a dry and clean place. Wipe it gently with a soft cloth if it gets dirty. Don't expose it to extreme temperatures or moisture to ensure its long - term performance.