Key Specifications and Features Device Model: HIOKI 3280-10F (Measurement Method: MEAN Value). Current Measurement Range: Measures AC current up to a maximum of 1000 Amps. Jaw Design: Thin Jaw for easy access to crowded wiring in electrical panels. Operating Temperature Range: Operates in a wide temperature range from -25°C to 65°C. Safety Levels: CAT IV 300V / CAT III 600V for Current Measurement (A Function). CAT III 300V / CAT II 600V for Voltage Measurement (V Function). Durability and Warranty: Drop Proof from 1 meter, comes with a 3-year warranty. Country of Origin: MADE IN JAPAN. Rotary Dial Functions OFF: Device power off. ~A / Flexible: Measure AC current via jaw or optional flexible current sensor. ~V: Measure AC Voltage. =V: Measure DC Voltage. For contact (mobile number appears when you press the contact button) Ω / Continuity: Measure resistance and continuity