J.Burrows Elite MK300 Instruction Manual page 6

Indicator Light
The white LED light on the mode keys flash alternately when keyboard has low power.
The blue LED light near the charging port will be on when charging.
The light will be off when fully charged. Full charging time is approximately 4 hours.
2.4GHz
Note
Fully charge your Elite MK300 before first use. Before charging, make sure the wireless
keyboard and mouse are turned off.
BT1 BT2
6/8
White White
Blue
OFF