TOKYO, Oct. 1 (Xinhua) -- A mobile phone with a breath analyzeris getting popular among transport firms in Japan as it can help the companies conduct tele-checks on the drivers' breath to prevent drunk driving.

The system, developed by a major mobile phone operator NTT DoCoMo Inc, has been introduced to 15 companies since its launch about three months ago. Dozens more bus and transport companies also mull buying it, the Yomiuri Shimbun newspaper said Sunday.

To use it, the driver first makes a video-phone call to his or her company and breathes into the analyzer connected to the phone. The video image showing the driver blowing into the analyzer and data regarding the alcohol concentration on his or her breath are transmitted to the firm and confirmed by the computer there.

If the alcohol concentration level exceeds the limit, 0.15 milligram per liter in Japan, a warning letter in red is displayed on the screen.

As the company can see video image, it is almost impossible for the driver to have someone else breath into the analyzer for him. The system, costing about 270,000 yen (about 2,290 U.S. dollars), therefore can allow companies conduct accurate tests even when drivers were on long hauls and could not return to office, the report said. Enditem