Specification: Connectors 1 : DC 5.5x2.1mm female jack. Connectors 2 : Mini USB male jack. Input/Output voltage : 5V. Note: 1. The output voltage is 5V ,Cannot use 9-12V voltage. 2. Do not use a 12V charger round go wrong insertion of mobile phones and other 5V electronic devices, that will burn electronic devices. 3. Please check that the interface of your device matches connectors 1/2 before purchasing. Package includes: 5PCS x 90 Degree DC5521 to Mini USB Adapters