Keenso Auto Headlamp Switch Light Sensor Module, Headlight Button Module with On/Off for Golf Mk4 Passat

【Auto On/Off Function】-- With this pratical switch module , you can easily set switch to auto, lights will turns on/off automatically when ambient brightness is lower/higher than the set value, convenient for daily use. Coming / Leaving Home: Only support Head Lamp 【Perfect Headlight Switch Module】-- Brand New Aftermarket Headlight Control Switch, robust plastic housing, not easy cracking, ultra durable, directly replace the old or broken hedlight switch, easy to install. OEM for reference: 1C0941531, 3BD941531, 3BD941531A. 【Quick Response】-- This headlight switch sensor module needs less than 1 second to be automatic open headlight, quick response, flexible control 【3 Lighting Modes】-- 1. Tunnel mode (Reaction time:1s); 2. Normal mode (Reaction time:3s); 3. Delay mode (Reaction time:5s), totally up to you. 【Battery Protection】-- Before the car starts, lights turn off automatically; after the car starts, lights turn on after 3s; Help to effectively to save energy and enhance battery service life