1. Stable Connection: Equipped with the latest Bluetooth-Compatible 5.1 chip, these earphones provide high-speed and stable transmission with strong anti-interference capabilities. The intelligent touch control operation makes them easy to use. 2. Dynamic Speaker: Enjoy stereo sound and deep bass effects with the dynamic speaker, delivering an exceptional listening experience. The ergonomic in-ear design ensures comfortable wear, while the large-capacity battery provides extended usage. 3. 1200mAh Charging Case: The wireless earphones come with a 1200mAh charging case, providing up to 48 hours of playtime for your convenience. 4. Noise Reduction: These Bluetooth-Compatible earphones ensure you never miss any part or component of your music. With noise cancellation technology, the sound is incredibly clear without any interference or background noise. 5. Universally Compatible: These earphones are universally compatible with all Bluetooth-Compatible devices, including smartphones, tablets, laptops, and more. Model: M22 Bluetooth-Compatible version: V5.1 Support protocol: AZDP/HFP/HSP/AVRCP Communication distance: 10 meters Headphone usage time: approximately 4.5 hours Charging box battery capacity: 1200mAh Earphone battery: 50mAh Interface: Type-C Functions: Waterproof, noise reduction, microphone, music playback/pause, answer/end calls, reject calls, up and down song switching, dual ear high-definition calls. Waterproof: Waterproof for daily use (sweat proof, rain proof, splash proof. Not suitable for diving, showering, etc.) Connection method: single/double use Colour:As Shown Material:plastic Package Contents: 2 * earphones 1 * earphone box 1 * USB charging cable 2 * ear caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.