Features:
• Monitor:  5.0 inches TFT LCD;
• Image Mode: B, B+B, B+M, M;
• Image Magnification: Image can be zoomed in 8 levels;
• Image permanent storage: 128 frames;
• Gray Shades: 256 levels;
• Character display: Hospital, Name, Age, Sex;
• Measurement: Distance, circumference, area, volume, heart rate, GA, EDD;
• Battery: Internal Rechargeable keeps working for 3h continually.