B11 Bluetooth 5.0 Retro Style Wireless Bluetooth Speaker, Supports Hands-free Calling & 32GB TF Card & 3.5mm Audio Jack 1. 5W speaker full screen range, unit of sound, bass and surround reverb match, let you listen to the music yourself. 2. Wireless Bluetooth transmission, using 5.0 upgrade chip, stable and fast transmission, effective distance of 10 meters, high-fidelity sound quality, restore music scene. 3. Built-in 1200mAh large-capacity battery, fast charging speed, long battery life, continuous use for about 6 hours. 4. Support Bluetooth connection playback, also support TF card playback, AUX input, broadcast (AUX import signal) and other four playback modes. 5. Built-in HD call microphone, intelligent noise reduction and no noise, support for hands-free calling. 6. With only compatible chips, it can adapt to various terminal devices, desktops, laptops, mobile phones, and can also be used as TV stereo. (Must be connected via Bluetooth). Product parameters: 1. Bluetooth version: BT 5.0. 2. External interface: Micro USB, TF auxiliary. 3. Output power: 5W. 4. Signal to noise ratio: greater than or equal to 75dB. 5. Voltage: 3.7V. 6. Channel: Stereo. 7. Bluetooth protocol: A2DP AVRCP HSP. 8. Material: ABS. 9. Battery capacity: 1200mAh. 10. Play time: 8 hours. 11. TF support: MP3, WAV. 12. Support TF card storage capacity: no more than 32GB. 13. Product size: 120x70x92mm. 14. Product weight: 235g.