bad breath checker - 7501A

7501A Mini 3 Level LED Halitosis detector ( V1.00 )
1、 Features
1) By HIG high-performance 8-bit microcontrollers (12 bit A / D) control, the MEMS sensor for the SM bad breath gas sensor (H2S);
2) Seven Color;
3) Single-button operation;
4) 3 files LED visual display, with low-voltage directive function;
5) At the top of a small high-brightness LED lighting;
2、 Technical Parameters
1) Show value: 3 LED display (green, yellow and red);
2) Test range: Ⅰ ~ Ⅲ level;
3) Warm-up time: 8 seconds;
4) Response time: ≤ 5 seconds ;
5) Recovery time: ≤ 15 seconds;
6) Alarm range: ≥ Ⅱ bad breath when the alarm, buzzer alarm;
7) Input power: DC 3V (CR2032 button ×1)
8) Products Size: 50 × 31 × 8.5mm3