1.Display size:90*23*23 mm 2.Step-up buzzer alarm 3.Numeral and color LED display description: ... 1,Numeral and color LED display 2, Step-up buzzer alarm 3,Left and right obstacle indication 4 ... 0.3m 5,Display unit with built-in buzzer 6,2,3,4 sensors for option7,Display size:90*23* ... package: Unit Weight: 0.56Kg 20 pcs/ctnN.W.: 11.2 kg /ctnG.W.: 12 kg /ctnMEAS:53*32.3* ...