... :3.7V/500MAH 3.Using for meeting,travelling,relaxing Portable Bluetooth Speaker Doss MINI DS-1168 Suitable for phone and tablet pc & computer1 ... ,easy cooperating.4. Pneumatic pressure cone technology,neodymium iron boron speaker,perfect quality sound. 5. Dual power,built in 3.7v 500mah ... ,it can be used as power bank.6. SIG certified bluetooth V2.1+EDR7. Using for meeting,travelling,car kit,children ...