M2 Stereo Bluetooth Subwoofer Loud Boat TV Home Theatre Wireless Bluetooth Speaker Features 1. 2 x 5W double horn full screen range, double pronunciation unit, bass and surround sound reverberation match, let you listen to music in person. 2. Wireless BT 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 2200mAh large capacity battery, fast charging, long voyage, can be used continuously for about 8 hours. 4. Support BT connection playback, but also support TF card playback, USB, AUX-IN and other four playback modes. 5. Built-in HD call microphone, intelligent noise reduction no noise, support hands-free calls.With display screen, display clock and current playback status, easy to use at night, can set alarm clock. 6. Equipped with only compatible chips, can be adapted to a variety of terminal devices, desktops, laptops, mobile phones can be used, can also be used as a TV stereo.(Must be connected via Bluetooth to use) 7. Bluetooth Stereo Speaker with TWS: Two speakers put a song to form a more audio array TWS function connection method: 1) First connect the fist speaker with Bluetooth to ensure the first speaker is used normally! 2) After turning on the second Bluetooth speaker, double click the power of the first speaker.Switch, the second speaker will be automatically paired to achieve TWS function! Highlight 1. Support Bluetooth music playback and call function 2. Support Bluetooth back link function and TWS function 3. Support TF card, support AUX audio input 4. The capacity of supporting TF card does not exceed 32GB (not included) 5. Support hands-free calling 6. Support USB audio input 7. Support FM radio function 8. Support clock and alarm settings. Specifications 1. Bluetooth version: BT 5.0 2. External Interface: Micro USB; TF 3. Output Power: 2 x 5W 4. Product Color: Black 5. SNR: 75db 6. Voltage: 3.7V <b