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Product number: 1
$5
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The RTL8188CU is a single-chip Wireless Local Area Network (WLAN) solution designed for low power consumption and high integration. Specification USB 2.0 (backward compatible with USB 1.1) Wi-Fi Standard IEEE 802.11b, 802.11g, 802.11n Frequency Band 2.4 GHz (2.412 GHz to 2.484 GHz) Data Rate (Max) 150 Mbps (downstream) / 150 Mbps (upstream) Antenna Configuration 1T1R (1 Transmitter, 1 Receiver) Security Support WEP 64/128, WPA, WPA2, WPA-PSK, WPA2-PSK Form Factors Nano dongle, high-gain external antenna adapter Bandwidth and Limitations
1x1 MIMO (Single Input, Single Output) internal printed antenna.
Windows Update will automatically identify the device and apply a functional driver. The RTL8188CU is a single-chip Wireless Local Area
Modern media consumption quickly saturates the 150 Mbps limit.
| Parameter | Value | |-----------|-------| | Chipset | Realtek RTL8188CU | | Standard | IEEE 802.11b/g/n (1T1R) | | Frequency Band | 2.4 GHz (2.400–2.4835 GHz) | | Max Data Rate | 150 Mbps (802.11n, 40 MHz channel) | | Interface | USB 2.0 (backward compatible with USB 1.1) | | Modulation | DSSS, CCK, OFDM, 64-QAM, 16-QAM, QPSK, BPSK | | Security | WEP 64/128, WPA, WPA2, WPS, IEEE 802.1x | | Operating Voltage | 3.3V (derived from USB VBUS) | | Antenna | External via IPEX or PCB trace (1T1R) | | Form Factor | USB dongle / onboard module | Modern media consumption quickly saturates the 150 Mbps
The RTL8188CU cannot see or connect to 5 GHz or 6 GHz Wi-Fi networks. It relies entirely on the crowded 2.4 GHz band, which is shared by Bluetooth devices, microwaves, and baby monitors.
Windows frequently puts USB network adapters to sleep to preserve system power, which breaks persistent downloads and gaming sessions. Open . Expand Network Adapters and right-click Realtek RTL8188CU . Click Properties and navigate to the Power Management tab. Windows frequently puts USB network adapters to sleep
The adapter is stuck in 802.11g (54 Mbps) mode or your router has 40 MHz bandwidth disabled on 2.4 GHz. Fix:
Up to 150 Mbps under optimal 802.11n configurations