Specifications are as below.t Center Frequency is 40.0u00b11.0KhzEcho Sensitivity is more than 200mVDecay Time is less than 1.2ms-6dB Directivity(Horizontal Angle)is 65~85 degree-6dB Directivity(Vertical Angle) is 45 degree or less thanDetecting Range(Distance) is 0.2~2.0mCapacitance is 2000u00b115% pf @120Hz 25 degree celsius Allowable Maximum Input Voltage( Vp-p)140 is(40KHz) Pulse width 0.5ms, interval 20msOperating Temperature( Degree Celsius ) is -40~+80u00b0Storage Temperature ( Degree Celsius ) is - 40~+80u00b0Material of the case is AluminumEmbedded Place is on the rear bumper of passenger CarMaterial of cable line is made of 48pcs of pure copper linesCable Length is 2500mm Show More