Wirelessly Stream Music from Any Bluetooth Enabled Device with Bluetooth 5.1 Bluetooth Connecting Range: 10m Up to 4hrs Built-In Lithium Rechargeable Battery FM Radio Shockproof -Rubberized impact-resistant silicone enclosure design AUX Input - Compatible with most devices with a 3.5mm AUX output IPX6 - Water Resistant - Speaker is resistant to water splashing from any direction. Hands-Free Mic - Easy picking up the call RMS Power Output: 5Wx2 Peak Power Output: 5Wx2 Speaker Size: 40mm Battery Capacity: 5V, 1800mAh Frequency Response: 20Hz-18KHz Play Time: Approx 3-4 hours Charging: Approx 3-4 hours Accessories: User manual, Charging cable