21W BA15s halogen 12V reverse bulb with built-in horn (≥95 dB). For all cars fitted with P2 1W BA15S lamps in the reversing light Engaging the reverse gear the lamp turns on and simultaneously emits an intermittent acoustic signal Easy and simple to install, simply replace the original bulb.
REVERSE ALARM WITH LIGHT SENSOR Alert pedestrians that the car is backing up. It is applied externally to the light by means of double-sided tape and is activated automatically when the reverse light is illuminated. No wires to connect and without drilling any holes. Long-lasting battery supplied. Not applicable on vehicles with LED rear lights.