Detachable portable shoulder strap The mesh cover protects the speaker from water, dust and vibration High sound quality stereo, support TF card or Micro SD cardCall function, noise cancellation microphone, let you answer the call without touching your phoneLED light function, your good outdoThe mesh cover protects the speaker from water, dust and vibration High sound quality stereo, support TF card or Micro SD cardCall function, noise cancellation microphone, let you answer the call without touching your phoneLED light function, The mesh cover protects the speaker from water, dust and vibration High sound quality stereo, support TF card or Micro SD cardCall function, noise cancellation microphone, let you answer the call without touching your phoneLED light function, your good outdoor helperyour good outdoor helperor helperThe mesh cover protects the speaker from water, dust and vibration High sound quality stereo, support TF card or Micro SD cardCall function, noise cancellation microphone, let you answer the call without touching your phoneLED light function, your good outdoor helperspecification:1. Bluetooth version: 2. Battery capacity: 4000mAh lithium battery3. Speaker: 3W4. Transmission distance: about 10m5. Frequency response: 10Hz-20KHz6. Signal to noise ratio: 85dB7. Working voltage: 3.7V8. Charging voltage: DC 5V9. Charging port: Micro USB10. Talking time: about 10h11. Music playback: about 10h12. Standby time: about 90 days13. Charging time: about 2.5h (different charger specifications time are different)14. Size: 168x52x52mm