Ultrasonic Micro Dopp System Foetal Monitor We offer a wide range of Ultasonic Punch Proves, which are made of superior quality material and available in the following specifications: • Operating Probe frequency :2MHz for Obs.Gyne. • Speaker/Ear Phone facility • Power Mains and Battry operated • Voltage : 220 V AC 50 Hz • Frequency : 2 MHz • Input : 9 Volt DC • Battery : 9 volt DC • Absorbed power : 9 volt DC • Audio output power : 4 Watts