1.Numeral and color LED display 2.2,3,4,6,8sensors for option description: 1,Numeral and color LED ... , Step-up buzzer alarm 3,Left and right obstacle indication 4,Numeral display from 1.8m to 0.3m 5,Display ... unit with built-in buzzer 6,2,3,4,6,8sensors for option7,Display size: 132*25*22mm 8 ... 20 pcs/ctnN.W.: 11.6 kg /ctnG.W.: 12.4 kg /ctnMEAS:53*32.3*42cm display: