1. 5.6 inch color LCD, can be regulated at the scope of 0-60º, so that the best visual effect can be gained. 2. Monitoring fetal FHR, TOCO and FM the three parameter 3. With the functions of input cases and storage. Wide line grapher outputs the reports. 4. Twins monitoring function is optional 5. AC-DC. Work time of the battery is more than 120 minutes.