-135°C Ultra Low Temperature Chest Freezer is a 58 L capacity comprised digital microcomputer-controlled unit. Features -135°C of cooling performance with self-overlapping refrigeration system and fluorine-free refrigerant. Ergonomic design with air pressure balance and super-thick foaming, has safety door lock design and universal casters. Equipped with LED temperature display and single compressor system, supports multiple protection function and advanced alarm system for safe and secure operation.