1 phrase precision ammeter/ ammeters-XL34LCDA Specifications: Power Supply: DC5V± 10% , Max: 30mAwith backlight LCD display: 12mm ( Backlight can be blue , green, white and red) Reading: 3½ digit, 1999count Relative humidity: 20% ~ 80% , this LCD display meter still can work at -20 degree. Auto zero-setting Auto polarity changing Sample period: 400ms Over-range display: the left digit display1or-1. Dimension: ( W) 79mm X ( H) 42.5mm X ( D) 25.5mm Install tapping size: 76mm× 39mm KEY FEATURES: 1. The position of decimal point can be set arbitrarily by the outer wire 2. Faster, less costly, Eco friendly 3. Superior quality at attractive price Over 17 years manufacturing histroy and 14 years cooperated experience with Panasonic on digital panel meter ! !