Battery and charging Charging compartment capacity: 400 mAh. The charging case provides power to recharge the earbuds when needed, helping to keep listening time convenient between charges. Single ear capacity: 50 mAh. Each earbud has its own battery, supporting independent use and consistent performance. Connectivity and range Transmission distance: about 10 m. Enables wireless listening and calling within typical home, office, or travel environments. Bluetooth version: 5.3. This version supports stable wireless connections with compatible devices and efficient power use. Compatibility and setup Compatibility: Works with Bluetooth enabled devices that support Bluetooth 5.3. No special adapters required for common smartphones, tablets, and laptops. Practical use scenarios Daily commute or travel: Maintain a reliable wireless connection within about 10 meters of your device for music, podcasts, or calls without frequent repairing. Office work or home office: Clear, stable audio for calls and media playback with broad device compatibility. At home or during light workouts: Enjoy audio with dependable range in living spaces or gyms where you move around within a typical room layout. Summary of key attributes Function: 400 mAh charging compartment powers the earbuds; 50 mAh per earbud battery for audio playback. Performance: Bluetooth 5.3 enables a stable connection over a 10 m range. Size and practicality: Compact charging setup designed for everyday use with common Bluetooth devices.