Thank you for viewing. From the product description: - Large-capacity battery with up to 54 hours of playback - 4 hours of playback with just 10 minutes of charging - Long-life battery that can be charged approximately 1,000 times - 12.4mm large titanium-coated dynamic driver delivers powerful bass - Titanium coating on the diaphragm also achieves clear and powerful high frequencies - Waterproof performance: IP55 - Bluetooth version: 5.4 - Compatible with the HeyMelody app