1. Comes with cable + USB output, can charge 4 cell phones at the same time 2. Faster charging speed, solve the power anxiety 3. Comes with two LED spotlights, can be used as a flashlight 4. Welding-free design, snap on the battery can be used, very simple and convenient 5. Compact size, more convenient to carry when going out to eat, shopping, traveling Parameter: Input: 5V2A Output: 5V2A Cell type:3 x 18650 flat battery (not included in the shipment) Warm tips: This section is free welding mobile power sets (circuit board + shell) non-mobile power finished products, shipping does not contain batteries, batteries need to purchase their own 18650 (flat) battery retrofitting can be used. Note that the capacity of each battery must be the same, do not put the reverse battery, put the reverse must damage the motherboard, ( for the positive pole, the spring for the negative pole) please put in correctly, no , the shell can not be disassembled for the second time, please get a good one-time! Color:Black Material:ABS Package Contents: 1 * 18650 battery box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.