DC 12V rechargeable lithium ion battery power bank, 3000mAh high capacity. DC 5521 port: Inner Positive(+), Outer Negative(-). Voltage range of the 12V output port is 12.6-9V, it is not constant, compatible with most 12 volt devices. Multi-led indicator, 5 LED indicators displaying battery percentage. 12 volt lithium battery compatible with most LED strip light products, CCTV Camera, IP Camera, LED Panel, Amplifier, Modem, Celestron NexStar, Car DVR, Speaker, Spectra S2 breast pump, etc. TalentCell Lithium-ion Battery Pack also runs robotic telescopes fine. 12.6V/0.5A wall plug AC/DC charger and DC 1 Female to 2 Male power splitter cable are included.