The spirometer device is a handheld device for examining lung function. It is designed for clinics and daily home use. Lightweight and portable compact structure. 1 .8 inch TFT 16x128 pixel display, LED backlight. Simple operation and quick test Rate-volume and volume-time waveform memory for diagnosis, data transfer to computer (via USB or wireless connection). Flow level: 16 L/s. Power capacity indicator and automatic shutdown (1 minute). Built-in lithium battery (DC 3.7V). Weight: 150gr.< br /> Contents; 1 pc. USB Cable 1 pc. disposable mouthpiece. 1 pc. power cord (optional). 1 pc. pc software. 1 pc. nose clip. 1 pc.user manual and warranty card.