uxcell Boat Guage Current Range 0-50A Ammeter LED Digital Display w Shunt Product Name : LED Ammeter Display;Power Supply : DC 4V-30V Display CurrentRange : 0-50A;Total Size : 48 x 28 x 22mm/ 1.9" x 1.1" x 0.87"(L*W*T) Cable Total Length : 13cm / 5";Casing Material : Plastic Color : Black;Weight : 80g Package Content : 1 x LED Ammeter Display;1 x Shunt : 1 x Shunt