1. Charging while working.
2. Each band can work separately or simultaneously.
3. Wind slots on both sides and inside cooling fans make a constant working.
4.With nylon cover, easy to carry.
It can be applied at meeting room, conference room, museum, gallery, theatre, concert hall, church, temple, restaurant, classroom, training center, factory, bank, train, bus, etc. For some locations of special purpose such as hospital, gas station, etc., please do field test first to make sure no interference happened to the normal operation of their equipment and instrument. It is easy to install and operate the device.
