The VON Corporation manufactures a complete line of Aerial Lift Test Sets. The model C-1 is the most popular unit for distribution class trucks (Category C and Category A&B to 69kV). Its 100kV output allows for testing of all Category C trucks and the largest bucket liners. The use of DC allows testing of even the largest bucket liners without purchasing extra-large and heavy testers required of AC testers. All VON testers are rated for continuous duty at full power, allowing continuous operation without concern for damaging the tester, unlike many competitive units.