Smart Error Correction Calculation 5GHz frequency support LDCP error correction calculation. Strengthen anti- interference performance. Boost WiFi signal and improve transmission speed rate. Wireless Dual Band Support 2.4GHz and 5GHz two frequency bands. The max speed rate can reach to 1167Mbps. 2.4GHz band supports longer, better coverage and through-wall performance. 5GHz band uses 802.11ac technology. Less interference, high rate. Watch HD video and play smooth game. Dual Core CPU for Faster Network Speed Featuring dual core four threading CPU, the single core frequency can reach to 880MHz. Strong performance easily support gigabit network and dual band WiFi data transmission. High Gain 4 Antennas for Stronger Signal 4 external high-gain omnidirectional antennas. Hugely improves transmission performance and do great job under various complex environment. 128MB Large Memory Smart home appliance era. More devices need stable connection. Xiaomi router 4A adopts 128MB storage that ensures stable transmission.