Generic Compatible Replacement AC Adapter Charger power adapter charger wire For Spektrum SPM9551 International Domestic Air Transmitter Roku 3 4200X & roku 2 2720x Wireless Digital HD Media Streamer High Quality Replacement Charger Part Over Voltage and Current Protection AC 110V-220V Wide International Travel Voltages Input Accessory USA AC Adapter Charger power adapter charger wire For Spektrum SPM9551 International Domestic Air Transmitter Roku 3 4200X & roku 2 2720x Wireless Digital HD Media Streamer Output:12V.Note:Please check your voltage whether it is 12V or not before purchasing. Thank you! If you need 5V adapter(for roku 2 XD ),please search ASIN: B00V9ZPQKE