12.1 colour TFT high-brightness screen. Equipped with reliable, high sensitivity, 12-element pulse doppler transducer. Rotatable screen viewed from different direction. Built-in high-speed thermal printer, printing width can be set by 112mm, 150mm or 210mm. 5 different styles of operation display at customer's optio. Optional function: twins monitoring function, automatic fetal movements detection, AFM waveform displayable Automatic monitoring mode, parameters can be preset.. Linux operation system, stable, easy to operate. 48 hours monitoring data playback Rechargeable Li-ion Battery Built-in network capability, supporting wireless network Main Function : Mars Series monitor is high-end fetal monitor, comprised of Fetal Monitor and Maternal / Fetal Monitor. They are designed for use in the antepartum, intrapartum and postpartum applications.