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M8821CU1 1T1R 802.11a/b/g/n/ac WiFi+BT4.2 Module

  • RTL8821CU
  • USB
  • 2.4/5GHz
  • 433Mbps
  • 1x1
  • 12.9*12.2*1.6mm
  • BL-M8821CU1


  • V4.2 


  • 1T1R 

  • USB2.0 Interface 

  • Wi-Fi 5 (802.11ac) 


BL-M8821CU1 module is designed base on RTL8821CU-CG. It supports IEEE 802.11a/b/g/n/ac 1T1R with high throughput data rate for WLAN products and provides the highest PHY rate up to 433.3Mbps. This module includes Bluetooth 2. 1+EDR and supports BT 4.2 system. It combines a WLAN MAC, a 1T1R capable WLAN baseband, modem and offers stable, high rate, long distance wireless connectivity through external antenna. It can be used on the IP Camera/Smart TV and other wireless devices easily.


  • Operating Frequencies: 2.4~2.4835GHz or 5.15~5.85GHz

  • Host Interface is USB2.0

  • IEEE standard: IEEE 802.11a/b/g/n/ac

  • Wireless PHY data rate can reach up to 433Mbps

  • Support Bluetooth v4.2

  • Connect to external antenna through half hole

  • DC 3.3V±0.2V main power supply

Block Diagram


General Specifications

Module Name




WLAN Standard

IEEE 802.11 a/b/g/n/ac

Bluetooth Standards

Bluetooth Core   Specification v4.2

Host Interface

USB2.0 interface for WLAN & Bluetooth


Connect to the external antenna   through half hole pad


12.9*12.2*1.6mm (L*W*H)

Power Supply

DC 3.3V±0.2V @ 500 mA (Max)

Operation Temperature

-20℃ to +70℃

Operation Humidity

10% to 95% RH (Non-Condensing)

Product Dimension

屏幕截图 2024-06-13 171740

Module dimension: 12.9*12.2*1.6mm(L*W*H; Tolerance:  ±0.15mm)

Package Dimensions



Package specification:

1. 2000 modules per roll and 10,000 modules per box.

2. Outer box size: 37.5*36*29cm.

3. The diameter of the blue environment-friendly rubber plate is 13 inches, with a total thickness of 28mm

    (with a width of 24mm carrying belt).

4. Put 1 package of dry agent (20g) and humidity card in each anti-static vacuum bag.

5. Each carton is packed with 5 boxes.


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