MINIX NEO A2 Wireless w/ Mic & Speaker for MINIX X5 X7 G-Sensor Game Gyroscope gaming support (on MINIX NEO series) State-of-the-art double-side keyboard Built in microphone and speaker - ideal for Skype calling and other VoIP applications USB plug-and-play micro receiver Lowe voltage indication function -LED will flash when battery below 2.2V