Car Parking Sensor Kit Reverse Backup Radar System with 4 Probes LED Display Buzzer Beep Alarm Item Type: Car Parking Sensor KitMaterial: ABSDisplay Type: LED Applicable Model: Car Power Supply Voltage: 12V DC Current Consumption: 20mA-200mA Maximum Power: 2W Working Frequency: 40KHz Probes: 4 Alarm Prompt: Equipped Detection Distance: 0.3-2.5m/11.81-98.43in or 0.4-2.5m/15.75-98.43inAlarm Distance: 0.3-1.5m/11.81-59.06in or 0.4-1.5m/15.75-59.06inAlert Type: Digital band display Working Temperature: -30~70(°C) Alarm Volume: 70~85dB (at 30cm/11.81in)Display Size: Approx. 100x22x26mm/3.94x0.87x1.02in Main Machine Size: Approx. 105x60x22mm/4.13x2.36x0.87in Probe Size: Approx. 22x20mm/0.87x0.79in