Transient Voltage Suppressors (TVS) Tester is used to reverse breakdown voltage test of unidirectional and bidirectional TVS tubes (transient-suppression diodes) 1. Model No.: ETCR3850 2. Voltage Range: 0~400V 3. Resolution: 0.01mV 4. Data Storage: 1000 groups each gears 5. Communication Mode: Serial port communication 6. Power Supply : External power adapter to power supply; AC110V~240V change to DC12V