Model Number:PSC-123 Specifications: Features: (1) Extreme Low E.s.r. :less than 0.002w: (2) Auto on/off four-digit display: (3) LED indicator lights; (4) Elevtronic Polarity Protection Circuit; (5) Over-voltage Protection Circuit; (6) Normal working temperature:minus 40&8451; to 95&8451; (7) Mounting brackets & hardware included; (8)Optipnal digit color: red, blue & white (9)Available in: 05F, 1.0F, 1.5F, 2.0F, 3.0F, 5.0F.