Don't Let The Model Number Fool You, The SC57 Is The Top-Of-The-Line Fieldpiece Clamp Meter. Like All Fieldpiece Tools, The SC57 Is Made Specifically For HVAC/R Professionals, and Is Packed with The Measurements HVAC/R Pros Use Everyday. Plus It's Wireless. That Means That Any Measurement You Can Take with A Fieldpiece Accessory Head, Can Be Sent Directly To The SC57 From Anywhere On The Jobsite. So Tests Like Temperature Splits Can Be Sent To A Tech While They Are At The Condenser Making Adjustments.