ASROCK B75M-GL R2.0 Manual De Instrucciones página 26

1. Only one of the front USB port can support CIR function. When
the CIR function is enabled, the other port will remain USB
function.
2. Multi-Angle CIR Receiver is used for front USB only. Please do
not use the rear USB bracket to connect it on the rear panel.
Multi-Angle CIR Receiver can receive the multi-direction infrared
signals (top, down and front), which is compatible with most of
the chassis on the market.
3. The Multi-Angle CIR Receiver does not support Hot-Plug
function. Please install it before you boot the system.
* ASRock Smart Remote is only supported by some of ASRock motherboards. Please refer to
ASRock website for the motherboard support list: http://www.asrock.com
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3 CIR sensors in different angles
ASRock B75M-GL R2.0 Motherboard