Redmi Buds 4 - Technical Specifications; Earbud and Case Specs

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Specifications
Name: Wireless Earphones
Model: M2137E1
Frequency Band: 2402–2480 MHz
Max RF Output Power: < 20 mW
Storage Temperature: 0 °C to 45 °C
Operating Temperature: 0 °C to 45 °C
Earbuds
Wireless Range:
10 m (in an obstacle-free environment)
Input: 5 V = 100 mA
Wireless Connectivity: Bluetooth ® 5.2
Charging Case
Model: M2137E1
Charging Port: Type-C
Input: 5 V = 450 mA
Output: 5 V = 240 mA