■ Portable and convenient to operate ■ based on latest piezo sensor technology ■ Powerful electronics amplify the sound up to a maximum of 32 times ■ 16 steps programmable volume settings ■ Sound model: Heart, Lung, Heart and Lung ■ Frequency Response: 20Hz - 20,000Hz ■ Real-time record and display the heart rate and ECG ■ TFT color LCD display (65536 color): 160*128 pixels ■ Accommodates infant, pediatric, and adult patients ■ 4.2V Rechargeable Lithium battery ■ Automatic switch off after 3 minutes from last button activation