1. Charging LEDSolid Red Battery is charging Solid Green Battery is fully charged 2. Power LED Solid Red Power is On Blinking Red Power is low Solid Green BT is connected Blinking Green BT is connected and power is low Solid Orange USB connected to PC Blinking Orange USB connected to PC and power is low 3. Mode LED Red BT SPP connected Green BT HID connected Orange Connected to BT pairing app or USB connected 4. Status LED Red UHF RFID ready Green Barcode scan ready