Experience robust home networking with the Xiaomi Mi Router 4A Gigabit Edition — a dual-band WiFi powerhouse designed to boost coverage, speed, and stability across your smart home, streaming, and gaming setups.

Dual‑core performance for fast, dependable network

Powered by the MT7621A dual-core CPU, with a single core frequency up to 880MHz, this router delivers strong performance to support gigabit network access and smooth data transmission across both 2.4GHz and 5GHz bands.

Unified 2.4GHz/5GHz WiFi with strong throughput

Wireless dual band support combines 2.4GHz and 5GHz into one seamless WiFi name. The 2.4GHz band provides longer range and better through-wall performance, while the 5GHz band uses 802.11ac technology for higher real-world speeds. The combined maximum reaches 1167Mbps, making it suitable for HD video streaming, online gaming, and heavy multi‑device use.

Four high‑gain antennas for reliable coverage

Four external high‑gain omnidirectional antennas dramatically improve transmission performance, helping maintain strong signal in larger rooms and through walls, across complex home layouts.

Ample memory for stable connections

128MB DDR3 memory supports stable transmission as more devices connect, reducing slowdowns during peak usage and ensuring consistent performance for smart home devices, phones, tablets, and laptops.

Smart app control and security features

Managed via Mi WiFi app, with features designed to minimize wifi squatters and manage access. Security options include WPA-PSK/WPA2 encryption, wireless access control (black/white lists), and SSID hiding for added privacy. 5GHz LDPC-like error correction helps strengthen anti-interference performance on that band.

Ports, hardware, and practical details

  • WAN port: 1 × 10/100 Auto MDI/MDIX
  • LAN ports: 2 × 10/100 Auto MDI/MDIX
  • LED indicators: 3 (Red/Blue/Yellow)
  • Power input: DC
  • Antenna: 4 external high‑gain antennas
  • Wireless channels: 2.4GHz (1–13), 5GHz (36,40,44,48,52,56,60,64,149–165)

What you should know

Note: This is the Chinese version. If you don’t understand the Chinese manual, you can download the Mi Router app to set up the router. The device does not support IPTV, L2TP, or PPPoE.

What’s in the box

  • 1 × Router
  • 1 × Power Adapter (Original US plug)
  • 1 × User Manual (Chinese)

Hardware

Brand

Xiaomi

CPU

MT7621A

RAM

64 MB128MB DDR3

ROM

16MB

2.4G WiFi

2X2 (support IEEE 802.11N, 300Mbps max)

5G WiFi

2X2 (support IEEE 802.11AC, 867Mbps max)

Antenna

4 PCS

Heat dissipating system

Natural heat dissipation

Material

ABS

Interfaces

Lan port

2 (10/100 Auto MDI/MDIX)

WAN port

1 (10/100 Auto MDI/MDIX)

LED indicators

3 (Red/Blue/Yellow)

Button

1 x Reset button

DC input

1

Antenna

Dual bands

2.4GHz / 5GHz

Wireless channels

2.4GHz Channel: 1,2,3,4,5,6,7,8,9,10,11,12,13

5GHz Channel: 36,40,44,48,52,56,60,64,149,153,157,161,165

Modulation mode

11b: DSSS: DBPSK(1Mbps),DQPSK(2Mbps),

CCK(5.5/11Mbps)

11a/g: OFDM:BPSK(6/9Mbps),

QPSK(12/18Mbps),16QAM(24/36Mbps),

64QAM(48/54Mbps)

11n: MIMO-OFDM:BPSK,QPSK,16QAM,64QAM.

Rate: MCS0~MCS15

11ac: MIMO-OFDM:BPSK,

QPSK,16QAM,64QAM,256QAM

Rate: MCS0~MCS9

Receiving sensitivity

11Mbps:≤-90dBm,54 Mbps:≤-72dBm,

HT20 MCS7:≤-69dBm,

HT40 MCS7:≤-66dBm,

VHT20 MCS8:≤-65dBm,

VHT40 MCS9:≤-60dBm,

VHT80 MCS9:≤-58 dBm

Software

Operating system

MiWiFi ROM (Supports Web, Android, iOS)

Wireless security

WPA-PSK/WPA-PSK2 encryption, Wireless access control (black and white list), SSID hiding

Protocol standards

IEEE 802.11a/b/g/n/ac, IEEE 802.3/3u

Approval standards

GB9254-2008 YD/T993-1998 GB4943.1-2011

Working environment

Operating temperature: 0-40°C

Working humidity: 10%-90%RH

Storage temperature: -40-70°C

Storage humidity: 5%-90%RH

Power: 12W max


General

Brand

Xiaomi

Type

AP

Router Connectivity Type

Wireless

Transmission Rate

300Mbps



Product Detail

Dimensions and Weight

Product weight

0.1250 kg

Package weight

0.1310 kg

Product size

6.90 x 6.90 x 3.50 cm / 2.72 x 2.72 x 1.38 inches

Package size

10.00 x 10.00 x 6.00 cm / 3.94 x 3.94 x 2.36 inches

Packing List

Packing List

1 x Original Xiaomi Pro 300M WiFi Amplifier

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Total price$291.83

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