This unit doesn't come with a power supply or a battery.

This JVC ProHD handheld mobile news camera is great for capturing news on the go. To use it, first make sure you have a compatible power supply or battery. Then turn on the camera by pressing the power button. You can start recording by hitting the record button. When using it, avoid using it in extremely hot or cold environments as this may affect its performance. For maintenance, keep the lens clean using a soft, dry cloth. Also, store it in a safe place when not in use to prevent any damage.