Microsoft said Tuesday it would sell a reduced-price version of its Xbox One console without the Kinect motion detection system.

The move comes with Microsoft locked in a tough battle with Sony, which has been leading the game console market with its next-generation PlayStation 4.

The Xbox One without Kinect will be sold starting June 9 for $399, the same price as the PS4, according to a blog post by Phil Spencer, head of the Xbox division.

Microsoft said in April it had sold 5 million of the Xbox One consoles since last year's launch, well below the 7 million PS4s sold by Sony.

One of the reasons cited by analysts was the $100 price difference between the two devices.

The Xbox One with the Kinect voice control and motion detection will remain at $499.