RoyalTek RBT-2210 - Manual (Page 6)

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2.3 LED Display
1 Yellow LED indicates power is in charging
2 Blinking Red LED indicates low power
3 Glowing Green LED indicates position is fixed
4 Glowing Blue LED indicates Bluetooth is connected
2.4 Hardware Features
2.4.1. Power Switch
Power ON / Power OFF
2.4.2. Power Jack
The power jack allows you to connect to either a DC (included) or
AC power charger to recharge the internal battery.
2.4.3. External Antenna Port (Optional)
If you have an external antenna with a MC Card (available
separately), you can use it instead of the RBT-2210 receiver’s
internal antenna. Simply plug your external antenna into the
antenna port.
2.4.4. Bluetooth Status LED (Blue)
Glowing - Bluetooth is on and ready to transmit.
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