>Signal transferred by carrier current,no distance limit,can work for any long vehicles.
>LED display indicationg obstacle distacne by digit and beeping sound alert.
>Main unit is 100%waterproof(soakproof),can be mounted in any places on trucks.
>4 digital ultrasonic sensors,very stable and accurate,no false alarming.
>Sensor are with soft rubber rounding,especially suitable for trucks with fierce vibration cirumstance
>All wire sockes are waterproof,thus can work in any weather conditions
>Sensor connecting wires is thick and with outer plastic shell,can protect inner wire well.