It is the charging box for the digital infrared receiving unit. The red light indicates that it is charging, and the green light indicates that the battery is fully charged.
Feature:
* 30 receiver units can be charged at the same time.
* The power input has a serial connection function.
* Fast charging takes 3 hours to fully charge; the maximum charging time is 8 hours.
* In addition to charging function, it can also act as a storage box for the receivers.