Tri-Mode Connection Without Fear of Binding：Support BT, 2.4G, wired mode connection to use, 2.4G wireless connection can realize the very fast response, say goodbye to the delay. Long press Fn+1/2/3 button for 3s to enter BT pairing mode, long press Fn+4 button for 3s for 2.4G mode pairing code (receiver plugged into computer).
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