How to check tour guide headset equipment to ensure it doesn't fail

If tour guide headset equipment malfunctions, the situation on-site will be more awkward than you imagine. With large crowds, noisy buses, and windy scenic spots, if the commentary can't be heard clearly, guests will quickly lose focus. I used to only check if the equipment could turn on, but later I realized that battery levels, channels, spare headsets, and poor microphone cable connections…