The Juicebar Power Tube contains a high capacity battery that can fully "juice-up" your smart phone with a single charge. The anodized alloy tube looks amazing, and Juicebar can hold charge for over 30 days, so you can "juice-up" right when you need it. Juicebar Power Tube is incredibly small and light, measuring just 3.5 inches x 0.87 inches and weighing only 2 ounces. Juicebar Power Tube supports all popular mobile phones and electronic devices. A built-in status indicator light glows red when Power Tube is charging, and changes to blue when fully charged. Lithium-ion battery specifications: 2,200 milliampere-hour; output voltage: 5 Volts; output current: 650 milliampere-hour; life cycle: 600X. Includes charger, connector cable, micro USB, mini USB and Nokia connectors and instructions (some devices require original cable). Black in color.