Capacity: 20000mAh. 2A Output for 12V vehicles jump start. 1 x Car Jump Starter. Input: 12V. Built-in power indicator light, 1Pcs for 25%, 2Pcs for 50%, 3Pcs for 75% and 4Pcs for 100%. Long-press the power key for 3s to turn on the flashing light, and press for quick flash, slow flash and off.