Description Bluetooth Speaker = 4000MAH power bank + Led ligh flashlight + Built-in microphone + Handsfree for calls + Waterproof + Shockproof + Dustproof 1. 11 hours of music playback, Enjoy music anytime, anywhere 2. HiFi,Subwoofer,Stereo sound 3. Built in microphone handfree for calls 4. 4000MAH Power Bank To charge the phone anytime,anywhere 5. IPX4 Grade Waterproof, excellent for Outdoor Sport and exercise and Travel 6. Led light flashlight ?Convenient for outdoor activities at night 7. Radio features Note:Do not soak in water;NFC function only for android. Product Features: 1. Bluetooth Resolution:CSR 4.0 2. Water resistance:IPX4 3. Housing material: Silicone 4. Operating distance: (free space)up to 10m 5. Talk/music playtime: about 11 hours 6. Frequency response: 20Hz-20kHz 7. Battery Li-ion:3.7V 8. Battery Capacity:4000mAh 9. Audio input:3.5mm Jack Cable and power connector 10. Speaker size: 156mm x 51mm x 51mm Package: 1* Bluetooth Speaker 1* Micro USB charging cable