What Bluetooth version do the Redmi Buds 4 Lite support?
The Redmi Buds 4 Lite earbuds support Bluetooth 5.3. The wireless frequency band used is 2402–2480 MHz, and the maximum RF output power is less than 20 mW.
From the official Xiaomi M2231E1 Redmi Buds 4 Lite Wireless Earphones manual, page 1
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