Input: AC 5.0V ~ 500mA USB Ouput: AC 4.2V ~ 500mA Frequency: 50/60Hz 0.15A Fit Model: 3-SKYPE WP-S1 Fit battery part number: Remarks: Universal USB Charger, Including Micro USB Cable Our products conform to international standards such as CE, FCC, RoHS RoHS approved for toxic free. CE and ISO9001 Certificate for quality assurance. Search Tip: Hold Ctrl+F. Window pops up & type a portion of your model number and click Find Next.