ZEALOT A1 Multifunctional Bass Wireless Bluetooth Speaker, Built-in Microphone, Support Bluetooth Call & AUX & TF Card & LED Lights 1. Detachable portable shoulder strap 2. The mesh cover protects the speaker from water, dust and vibration 3. High sound quality stereo, support TF card or Micro SD card 4. Call function, noise cancellation microphone, let you answer the call without touching your phone 5. LED light function, your good outdoor helper specification: 1. Bluetooth version: 5.0 2. Battery capacity: 2000mAh lithium battery 3. Speaker: 5W 4. Transmission distance: about 10m 5. Frequency response: 20Hz-20KHz 6. Signal-to-noise ratio: 85dB 7. Working voltage: 3.7V 8. Charging voltage: DC 5V 9. Charging port: Micro USB 10. Talk time: about 3h 11. Music playback: about 3.5h 12. Standby time: about 30 days 13. Charging time: about 2.5h (different charger specifications time are different) 14. Size: 182x70x70mm