Range: -58 to 99°F (-50 to 99°C). Input: PTC thermistor (1000Ω @ 25°C), not included. Power Requirements: 110 VAC or 230 VAC (depending on model). Accuracy: ±1% FS. Display: 2-digit plus sign, red, 1/2" H digits. Resolution: 1°. Front Panel Rating: NEMA 4X (IP65). Weight: 2.3 oz (65 g). Agency Approvals: UL, CE.