Features: High-resolution color TFT-LCD screen (Touchable screen as optional) Great sensitive waterproof FHR transducer Flat surface design and waterproof TOCO transducer Great monitoring waveform storage and playback Built-in long-life thermal printer Compatible with 150/152 mm universal recording paper Compatible with American/International standard recording paper Signals Overlap Verification to separate twins FHR Internal monitoring function as optional Built-in rechargeable battery Optional telemetry transducer system PC management software and central monitoring system supportive