No need extra Power, from mini HDMI Power. The built-in chip. The mini HDMI to VGA Adapter allows for a connection to VGA monitors and projectors supporting a maximum resolution of 1920 x 1080. It supports full-size high-definition resolution of 720p or 1080p. Can use for All mini HDMI input to VGA output device. Supported Video Device.
Notice: Please make sure your device is with a MINI HDMI port! This product is designed for MINI HDMI products only!