Features:
Compatible for products that use F550,F570,F770,F750,F970,F990 batteries.
Lightweight and durable, with a USB cable, can be powered by external mobile power supply.
Suitable for all brands of camera lamps, useful and practical, and affordable.
USB with booster function, raise 5V to 7.4V to make the product more stable.
Input voltage is 5V-8.4V, the output voltage is 7V-8.4V.

Specification:
Condition: Brand New
Material: Plastic
Color: Black
Input Voltage: 5V-8.4V
Output Voltage: 7V-8.4V
Size: Approx. 7 x 4.2 x 2 cm / 2.8 x 1.6 x 0.8 in
Weight: Approx. 56g

Package List:
1 x Dummy Battery
1 x USB Cable

Note:
Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.