MUTEWATCH, a Swedish wristwatch, has begun full-scale operations in Japan.

The watch's main functions are clock, alarm, and timer. Tapping the surface illuminates the display panel, and LED numbers appear graphically. Simply flick the display to select each function. The alarm uses silent vibration; a motion sensor detects the user's movements and automatically adjusts the vibration intensity accordingly.

MUTEWATCH was developed by founder Mai-Li Hammargren, who wanted a watch that would help her wake up early without waking her bedmates. Because it uses silent vibration to tell the time, it can be used safely even in spaces where alarms or vibrations are prohibited, such as during presentations.

Since its release in 2011, it has been loved by designers such as Chanel designer Karl Lagerfeld and Apple co-founder Stephen Wozniak. In 2012, it won Germany's Red Dot Design Award.

The battery lasts for three to four days with a two-hour USB charge. Future feature updates will also be available via USB. It is washable.

It comes in six colors, including pure black, poppy red, and indigo blue. Each costs 22,050 yen. In Japan, it is available at the MoMA Design Store and Restir Digital.