Product Specification:
Battery capacity: 50000mAh
Battery type: li-polymer battery
DC Input: 19V/2A
TYPE-C Output: 5V/9V/12V 3A (max)
USB Output1: 5V/9V/12V 3A (max)
USB Output2: 5V/9V/12V 3A (max)
DC Output: 5V/8.4V/9V 3A (max)
12V/16V/20V 4.7A (max)
Compatibillty: MacBook, MacBook pro, notebooks, digital camera, Projector,psp, wireless router, tablet PCs, cell phones, etc.

Instruction for Use:
When charging laptop with DC output port, first, press the button for two seconds to start up, then double click the button to adjust the voltage to what your laptop needs and it can start charging.
When charging devices with Type-C or USB1/2, you do not have to adjust the voltage; connect your devices with the power bank directly.

28 Laptop Connectors:
1.4.8*1.7mm for HP,Compaq,Datle
2.5.0*1.1mm for Samsung
3.5.5*1.7mm for Acer
4.5.5*2.1mm for Acer,SONY
5.5.5*2.1mm for Benq,Acer,Toshiba,Compaq,NEC,IBM,HP
6.5.5*2.5mm for Datle,Fljitsu,Liteonit,Dell,IBM,HP,ASUS,Compaq
7.6.3*3.0mm for Toshiba,Acer,NEC
8.6.4*4.4mm for SONY,Fljitsu,Samsung
9.3 pin for Dell
10.4 pin for Toshiba
11.7.4*5.0mm for HP,DELL
12.4.5*3.0mm for HP,ASUS ZenBook UX501(19.5V 6.32A) For Folio 9470m C8K20PA
13.7.4*5.0 for Dell
14.7.9*5.5mm for Lenove, IBM, Thinkpad
15.2.0*0.5mm for Nokia
16.for Levono Thinkpad Ultrabook X230S/S3/S5/X1/E431...Yoga 11s/Yoga 13
17.2.5*0.7mm for the most of the tablet pcs
18.4.0*1.35mm for ASUS
19.4.5*3.0mm for Dell
20.3.0*1.0mm Acer S5, S7, W700, X313, M3
21.3.5*1.35mm for Dell, Sharp
22.4.0*1.7mm for Asus, Benq, Acer, Sony
23.4.8*1.7mm for HP, ASUS, NEC, Datle, Compaq.
24.5.0*2.1mm
25.5.5*1.5mm
26.5.5*2.5mm
27.5.5*2.5mm for Lenovo
28.5.5*2.5mm