easy, simple, compact. handy sized breath checker by Tanita.
Tanita is a brand well known for good medical care products in Japan.

Breath Checker features:

• Semiconductor gas(odor) sensor
• Checks your breath condition on a scale of 0-5 (5 is worst).
• Easy to use
• LCD display

How to use?
Simply blow or breath into the tester, then you get a results.
You can check the quality level of your breath from 0 (:odorless)  to 5 (:very bad).
Would be great help before the date or important business meetings, or simply for keeping oral condition.

Etiquette Checker Specification:

• Size: 165 x 316 x 93mm
• Weight: 45g
• Material: ABS plastic
• Power: 2 x AAA battery (included)
• Instructions (in Japanese)