*_MARVEL / JBL / BOAT COMBO 4 in 1_* *BOAT 131 MARVEL EDITION:* >True wireless stereo, left and right channel separation, HIFI sound >Both the left and right ears have a full Bluetoth headset function, which can be used alone or in paire >Dual Mode Bluetooth 5.0, ultra iow power consumption >Bluetooth transmission distance: 10 meters >Battery backup upto 4 hrs >Charge box charging: about 3 times >Charging box charging time: 1 hour *JBL 59:* >wireless >connected with ios& android >powerful sound >LED Avengers Logo >Hi Rec Audio >world-class Fame Marvel Avengers >Quick pair >4 Button (volume, music &call control) >up to 8 hours per charger *Neckband Boat:* >2 hrs charging time >4/5 hrs backup >Heavy Sound ———————— shipping charge extra no replacement