When selecting wireless explanation devices for large groups, there are several key factors to consider.

Firstly, the transmission distance should be far. This ensures that no matter where the visitors are in the group, they can clearly receive the explanation content, avoiding the situation where they cannot hear clearly when they are far away from the explainer.

Secondly, the sound quality should be clear. There should be no noise or distortion to ensure that the conveyed information is accurate.

Furthermore, the device should be stable and reliable. It should not frequently experience signal interruptions during use, which would affect the smoothness of the explanation.

Comfort of wear is also a consideration. For visitors in large groups, they may need to wear the receiving headphones for a long time, and discomfort can bring a bad experience to them.

In addition, the battery life of the device is important. Especially for long visits, there should be no situation of insufficient power.

Lastly, operability is also a factor to consider. The device should be easy to operate, allowing the explainer to get started quickly and improve the efficiency of the explanation.

By taking these factors into account, you can choose a wireless explanation device suitable for large groups, bringing a high-quality explanation experience to the team.