... display 2.2,3,4,6,8sensors for option description: 1,Numeral and color LED display 2, 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 ... ,Display size: 132*25*22mm 8,Wireless between display and control unit (HY5200L for option)package: Unit Weight: 0.58Kg 20 ...