The Chison L12-V Linear transducer has a frequency range of 7.0 MHz. – 18.0 MHz. and supports the following applications: Abdominal, Anesthesia, Breast, Cardiac, MSK, OB/GYN, etc…. The L12-V transducer is compatible with: Sonobook 6, Sonobook 8, Sonobook 9 ultrasound systems.