Chison linear probe, center frequency 9.0 MHz for Portable Ultrasound Machines ECO series. Probe for Chison portable ultrasounds: - Chison code: L7S-A - Scanning method: Linear (with 30 mm footprint for superficial tissue exams with higher resolution) - Main Frequency: 9.0 MHz - Frequency Range(MHz): 5.3 / 11 - Applications: Small Parts, MSK, Vascular, Pediatric, Orthopaedic