Features:
-This product applies to all models cars
-New LED technology anti-collision lights,build in high-tech component sensor, long service life
-When the door is opened, it flashes rapidly, warning the rear to avoid the accident occurred
-No external wire, just paste on to your car door easily
-First 6 seconds "rapid flash" mode, best warning to the rear of the car. After 180 seconds lighting, it will be off automatically.

Specification:
Product Name: car door collision warning lamp
Power: 5V CR2032 Button Battery(include)
Light Source: LED
LED Qty: 5pcs beams
Emitting Color: red, yellow, blue, rgb
Material: ABS, magnet
Size: about 28mm*8mm(D*H)