Cordless Bluetooth ear buds fit in magnetic ports in power bank. Push bottom of power bank to slide ear buds up for access. Compatible with most Bluetooth devices. 2200 mAh Capacity: 5.0 V 1A output; UL Certified. Has one USB port, one Micro USB port and two ear bud ports. Includes Micro USB charging cable and rechargeable lithium battery. Charges most small portable devices; Not for tablets