I consider the transaction to be complete from listing to purchase, arrival, and confirmation, so I will handle everything with responsibility until the end. ※Please note that the package may be subject to change. The product itself is the same. Two AAA batteries (sold separately) are required. I'm sorry, but I cannot offer a discount. The severity of bad breath based on the checker's readings: 0 Excellent 1 Normal, no problem 2 Requires some care 3 Please start taking care of it immediately 4 Are you aware of how deadly your breath is?? The wording was created by me and a dental hygienist friend. Please use it as a reference. Convenient to carry around: Size: Approximately 10cm x 4cm x 2cm Weight: 40g It's really small and can fit in your pocket, so you can take it to the restroom at work or after lunch to check your breath. If you get a bad reading, you can take action immediately with something like a breath mint. Bad breath can make both you and your friends and loved ones uncomfortable. Even if you think you're fine, you might want to try it once just to be sure.