Model Number: Sb-E16-#3030 Brand Name: Cisbo Key Specifications/Special Features: 1). Three sensors install in name plate and detect obstacle distance2). No display: the sensors aid detecting potential back obstacles and enable accurate distance measurement to make reversing safe and convenient3). DIY install, auto-detecting and auto-alarming mechanism4). Three stage switch to change the sensor sensitivity according to the name plate height. The height is mean the sensor to ground Stage 1: 35-40cm height Stage 2: 40-60cm height Stage 3: 60-80cm height5) Alarmed by three stereo bi-bi sound, no display6) Easy to install, no damage to car bumper7) Neutral packing box/white box size: 61*38*36.5cm8) Neutral packing box quantities in one carton: 10pcs White packing box quantities in one carton: 20pcs