features: microphone built-in. 6-axis inertia sensors built-in. 2.4g rf wireless technology, high stability. 2.4g wireless keyboard input ir control and ir learning for all keys plug and play, cd-rom installation is free, optimization and custom designed for android system, achieve application of intelligent human-computer interaction,and enhance the feel of experience. speicifications: 2.4g fly mouse 2.4g wireless keyboard 6-axis inertia sensors, support somatosensory games 4 ir learning keys mouse cursor on/off supports the systems of android, windows, mac os, lilux distance of remote up to 10 meters sensor 3-gyro + 3-gsensor amount of key 81 control distance ?10m battery type aaa x2 working power less than 10ma in the work condition without vioce input, less than 15ma in the state of voice input standby power microampere, almost no power, in line with the european "energy star " environmental standard material plastic and silicone package included: 1 x mx3 backlit airmouse with microphone 1 x usb receiver