The Thermo King Corp. Precedent S-700 is the only deep-frozen refrigeration unit with shore power capabilities, according to the company. The S-700 features industry-leading pull-down and is an ideal solution for customers moving temperature-sensitive products like pharmaceuticals, fresh seafood or other deep-freeze loads through hot climates. The S-700 features a completely new platform for the trailer market designed to be fully compliant with the new Environmental Protection Agency (EPA) Tier IV final regulations without the addition of diesel particulate filters (DPF) or engine emissions systems (EES).