The power bank is dual-output, charge two mobile devices simultaneously. With battery power display, convenient to use.
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Features:
The power bank is made of high quality material, very durable.
4000mAh large capacity: premium Li-ion battery cells add an extra 4000mAh to the battery life of your smartphone, tablet or digital?camera.?
2-ports: DC5V/1A + DC5V/2.1A, convenient to use.
Slight shake to display the power.
Dual-output, charge two mobile devices simultaneously.
Simple design: connection ports are located on one end of the power bank.
With battery power display, convenient to use.

Specifications:
Brand: Besiter
Model: BST-008B
Color: White, Black (Optional)
Material: ABS
Input: DC 5V-2A
Output1: DC 5V-2.1A
Output2: DC 5V-1A
Cycle Life: !#!gt!*!500 times.
Charge Time: 2-4h ?
Product size: Approx. 9.5 * 5 * 2cm / 3.7 * 1.9 * 0.8in
Product weight: Approx. 129 g / 4.54oz?
Package size: Approx. 19.5 * 10 * 2.5cm / 7.7 * 3.9 * 0.98in
Package weight: Approx. 177g / 6.24oz

Package List:
1 * Power Bank
1 * USB Cable
1 * User Manual (English)