Power adapter Product parameter Product parameter:Power Adapter Specifications: EU Standard/US Standard Input:AC110-240V 50/60Hz Output:12V-2A Note: Firefly-RK3399 normal work requires power 12V/2A, it probably abnormal restart if the current is less than 2A. In order to ensure the normal operation of the Firefly-RK3399, please use the voltage of 12V, current is 2A ~ 3A power, and we suggest to use the official power. picture