Boost up your rechargeable battery with this WF-139 Universal Double Battery Charger Black (US Standard)! The universal design makes it capable to charge for various types of batteries， and the double design enables it to charge for two batteries at the same time. Adopting high-level electronic components it is of fast charging speed to save your time. Moreover， its compact size and light weight provides great portability， easy for you to carry along. What are you still waiting for? Grasp the chance and take it home now!                                    Features             High charging efficiency to save your time<br> Universal design to charge for various types of batteries<br> Double charging design to charge for two batteries simultaneously<br> Light and compact for easy carrying<br> Attached with a power cord for quick applying   <br>                                                            Specifications             Material     PC    <br> Color     Black    <br> Model     WF-139    <br> Standard     US Standard    <br> Input 1     100-240V 50-60Hz     <br> Input 2     12V  400mA    <br> Output     4.2V  450mA     <br> Suitable for     3.7V Lithium Batteries    <br> Dimensions     (5.35 x 2.44 x 1.18)" / (13.6 x 6.2 x 3)cm (L x W x H)    <br> Weight     4.76oz / 135g     <br>                                                             Package Includes            1 x Battery Charger<br>1 x Power Cord<br>